raw egg in coke experiment

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Will Immersing an Egg in Soda for 24 Hours Dissolve Its Shell?

This eggcellent eggsperiment has clearly been eggsagerated., published may 31, 2019.

About this rating

In May 2019, a video showing the bizarre reaction that supposedly takes place when an egg is immersed for 24 hours in soft drinks such as Coca-Cola and Pepsi went viral on Facebook. The original video, which was posted to TikTok by @blogerwojciech, can be seen below:

This video supposedly shows an eggshell being dissolved in Coca-Cola and Pepsi, leaving behind a rubbery, squeezable sac. Blogerwojciech didn't provide much of an explanation for how this reaction allegedly occurred, writing only that Cola + Pepsi + ?+ 24godziny ? Zaskoczeni (Cola + Pepsi + ?+ 24 hours = surprised).

This video, however, does not showcase some sort of bizarre chemical reaction, but rather how some clever edits and an egg toy can entertain millions of viewers on social media.

One immediate red flag is that the egg in this video is hidden from view when the filmmaker places a mug over the soda-filled cup, and then again when it's retrieved from behind a sign reading "24 H." In other words, the viewer has no idea how much time has really elapsed and never actually sees the eggshell dissolving.

Hiding the egg in this manner (as well as cutting down an alleged 24-hour time span to just a few seconds) would make it easy for the filmmaker to switch out the real egg with a prop — perhaps with some sort of squishy, egg-stress ball toy, such as this product available via Amazon:

We reached out to @blogerwojciech and he confirmed via email that he used a fake egg in the viral video. @blogerwojciecj also directed us to another one of his TikTok videos in which he revealed how the video was made:

While this video certainly employs some trickery, it is reminiscent of a classic, real "eggsperiment": When an egg is soaked in a subtance such as vinegar for multiple hours, the shell will dissolve and leave behind a "naked egg" that you can (kind of) bounce on a table:

Here is a classic experiment with eggs. If you soak a raw egg in vinegar, over the course of time, the vinegar will dissolve the eggshell. What you’re left with is the egg’s translucent membrane to protect the egg. Since the shell is made up mostly of calcium carbonate -- it contains calcium carbonate (94%), magnesium carbonate (1%), calcium phosphate (1%), and 4% organic matter -- vinegar which contains acetic acid will dissolve the shell. Soaking an egg in vinegar produces what is known as a “naked egg,” which is an egg without a shell. The vinegar dissolves the shell but leaves the membrane that holds the egg intact. This experiment provides a fascinating way to observe chemical reactions and the anatomy of an egg. You will see the membrane that acts as an additional defense for the egg. You can also watch the eggshell, comprised mostly of calcium carbonate, turn into aqueous calcium, water and carbon dioxide through the chemical reaction with vinegar, which is an acid.

While this naked egg will "bounce," the contents inside the membrane don't harden the way they supposedly do in the viral TikTok video. If you squeeze the naked egg too hard, the membrane will crack, and its contents will spill out.

Here's a video of the egg-in-vinegar experiment. You can read more about how to do it yourself at " The Science of Cooking ":

Seattle Post-Intelligencer .   "Experiment on Putting an Egg in Vinegar."     Retrieved 31 May 2019.

Science of Cooking .   "Naked Egg Experiment."     Retrieved 31 May 2019.

By Dan Evon

Dan Evon is a former writer for Snopes.

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Egg and Soda

Put your observation skills to the test!

If you’re looking for a fun activity to help hone kid’s observational skills, try this egg and soda eggs-periment !

Bonus  – you can also highlight the value of healthy oral hygiene!

How to:  1.    Fill a glass with cola. 2.    Place raw egg into the glass. 3.    Soak the egg in the glass filled with cola for 1 hour.  4.    Check on the egg every 15 minutes, have the children write down any observations they have about the egg. Have them include as many details as possible. 5.    After 1 hour, remove the egg from the soda. 6.    What happened to the egg? What happens when you use a tooth brush and tooth paste and brush the egg?  Are there any similarities between the egg and your teeth? 

Result:  The egg becomes stained with cola and can be removed by the toothpaste. 

*You could add in an extension activity to this, where you get kids to leave the egg in cola for 24 hours. They could hypothesize based on what they think might happen (based on what happened after an hour).

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Egg in Soda Experiment

.Ella Martin Egg in Soda Experiment

Classroom Activity for Learning About Dental Health Via an Egg in Soda Experiment. At Tender Times Child Care and Preschool they were little scientists for the day!

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The class did an experiment with an egg put in soda to learn all about why brushing their teeth is important--especially after eating or drinking sugary treats. Everyone learned about how teeth have enamel that can be stained by sugar and used eggs to represent this for the experiment. Then the eggs were put in soda and stained with it! It was a very fun unit and was a fantastic way to visually illustrate what sugar can do to our teeth.

Materials for the Egg in Soda Experiment

To do this experiment you will need:

Two white-shelled eggs that have been hard-boiled.

2 clear cups made out of glass or plastic.

A dark soda such as cola or root beer to put in one cup.

Water to put in one cup.

A toothbrush and toothpaste.

Science Experiment Worksheet

Simply click on the worksheet for it to open at full-size, then print it!

How to Do the Egg in Soda Experiment

Follow these steps to do the experiment:

First, explain to your class how all our teeth have a protective covering that is called enamel. Discuss how an egg's hard shell that protects everything inside is like enamel for our teeth.

Talk to the students about how this experiment will illustrate what happens to teeth (via the egg) if a sugary drink is allowed to be left on them for an extended period of time.

Place a (cooled) hard-boiled egg in the cup of soda and place the other hard-boiled egg in the cup of water. Let them sit in the glasses over a night.

The next day at school, check the eggs with the students and talk about what results everyone observes. The egg that soaked in the soda will have its shell be stained and the egg that soaked in the water will still be a bright white.

Have the students practice brushing by using the toothbrush and toothpaste on the stained egg. They will be able to clean some of the stains off, just like how we keep our teeth clean with toothbrushes and toothpaste!

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Eggsperiment: Make a Bouncy Egg | STEAM Activity for Kids

by Emily | Jun 29, 2023 | STEAM Experiments , STEAM for Kids | 0 comments

Grab your kids and an egg (or three), and get ready to blow your kids’ minds with this eggsperiment! At the end of this experiment my daughter looked at me and said, “This is the best experiment we have ever done!” We have done 90 experiments over the years for this blog, so those words mean a lot coming from her!

In this post and YouTube video we test soaking eggs in 3 different liquids: water, coke, and vinegar. There is educational value to experimenting with all 3 liquids, as I’ll explain in the STEAM Concepts Learned section below. But I will be honest with you: the vinegar reaction is far and away the best part of this experiment. If you only have one egg to spare, just do the vinegar. If you happen to have 3 eggs, you might want to do all 3 in the vinegar… 😉

A fair warning for before you begin : this is a multi-day experiment. You or your kids may read the title and expect to see the bouncy egg quickly, but it will take at least 2 days to see the results.

I think I’ve hyped this long enough, so let’s get started! First, watch our YouTube video where we walk you through the whole experiment, step by step, and explain the science along the way. Then, keep reading below for my full step-by-step instructions with photos that you can come back to time again for summer STEAM Activity fun!

• 3 small bowls or cups

Note : If you’re only using vinegar you’ll do steps 1, 4 to 7, and 12 to 16.

• Place one egg in each of the 3 small bowls
• Pour enough water into the first bowl to completely cover the egg

• Pour enough Coke into the second bowl to completely cover the egg

• Pour enough vinegar into the third bowl to completely cover the egg

• Make an observation about each of the eggs in the liquid. What do you see happening? We observed bubbles all over the egg in the vinegar, a few on the egg in the Coke, and nothing on the egg in the water bowl.

• Set the bowls aside for 2 days. This wait is the hardest part of the experiment!

• After 2 days, bring out the 3 bowls you set aside, and it’s also helpful to grab some paper towels and plates.

• Pull out the egg from the water bowl and dry it with a towel. Make observations about the egg shell – has it changed color or texture? Ours had no change.
• Optional but fun : drop the water egg from about a foot high and see what happens. Ours cracked open and looked like a normal egg inside.

• Pull out the egg from the Coke bowl and dry it with a towel. Make observations about the egg shell – has it changed color or texture? Ours had been stained dark brown, the color of the Coke.

• Optional but fun : drop the Coke egg from about a foot high and see what happens. Ours cracked open and looked like a normal egg inside.

• Carefully pull out the egg from the vinegar bowl and gently dry it with a towel. Make observations about the egg shell – has it changed color or texture? Ours was almost double it’s original size, and soft because the egg shell had dissolved!
• Gently wash the vinegar egg under water to completely remove any remnants of the shell. It will now look like a smooth see-through egg!
• Spend time gently touching the vinegar egg. What does it feel like? Ours felt smooth, rubbery, and squishy.

• Try bouncing the vinegar egg from very short heights (6 inches or less), and observe what happens. Ours bounced and rolled!
• Optional but fun : drop the vinegar egg from about a foot high and see what happens. Ours BURST open and splattered us with liquid! It was filled with the normal yolk and white of the egg, and also vinegar! We were also able to observe the membrane that was under the shell.

STEAM Concepts Learned:

The water egg was done as a control for the experiment. Water has a similar pH to the egg and also our body and teeth. This is why the egg shell was not affected by the water, so it remained unchanged throughout the experiment.

I included the Coke egg in the experiment to show my kids what drinking too much Coke and not brushing can do to their teeth. Egg shells and our teeth enamel have similar properties – both contain calcium carbonate. The Coke contains acid and sugar. It doesn’t have as much acid as the vinegar so it didn’t dissolve the shell as the vinegar did, but it would have if we left it in the Coke for longer (and we saw the CO2 bubbles form from the chemical reaction like in the vinegar).

The Coke stained the egg shell because of the sugar and dark colors in it. The sugar forms plaque on your teeth which will become a home to bacteria. If left unbrushed the bacteria will create acid which will eventually eat away the enamel on the teeth.

I think my kids really listened to my explanation about Coke staining their teeth. I let them drink Coke on occasion, but I’d like them to see it more as a special treat, and understand the importance of brushing their teeth well after drinking dark colored and sugary drinks.

The vinegar egg was the most exciting because a chemical reaction occurred to dissolve the eggshell. The acetic acid in the vinegar reacted with calcium carbonate in the shell and this chemical reaction eventually dissolves the shell. One product of the reaction is carbon dioxide – and that’s why we saw the little bubbles all over the egg!

Once the shell dissolved the egg is left with its membrane intact, but it’s a thin, semi-permeable membrane, so vinegar was able to get inside the egg making it swell! This thin membrane is strong enough to allow the egg to bounce (from short heights), but if dropped from too high it will burst open.

My kids absolutely loved this experiment! They had so much fun observing the eggs, breaking open the eggs, bouncing the vinegar egg, then finally playing with the insides of the broken eggs.

If you try this experiment I hope you and your kids have as much fun with it as we did! Let us know how you liked it in the comments.

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5 CRAZY COCA COLA EXPERIMENTS

Introduction: 5 CRAZY COCA COLA EXPERIMENTS

Awesome experiments with the number one soda in the world!

Step 1: The Effect Coke Has on Your Teeth

In theory an egg shell works similar to the enamel found on your teeth. Grab a can of Coke, an empty jar, and one delicate egg. Place the egg within the jar and pour the coke over the egg. Store the jar in a safe place for one day. Once twenty four hours have passed, open the jar and pour the soda into a bowl slowly, leaving the egg in the jar. Gently remove the egg from the jar and examine what the soda has done to the shell. Remember the egg represents the enamel on your teeth!

Step 2: Coke & Bleach

In this experiment use a 16.9 oz bottle of coke. Open the bottle and fill it to the top with bleach. Note: Label the bottle or store it in a place no one will drink it! Seriously DO NOT DRINK IT! The process is slow but again wait for twenty four hours to pass and come back to a surprise!

Step 3: Cleaning Pennies

Grab five old pennies before the year 1982, and one current penny. Fill five glasses with the following - bleach / rubbing alcohol / vinegar / lime juice / coke. Place one penny in each glass. After one day remove each penny and see which one comes close to matching the shiny current penny. Coke is the winner!

Step 4: How Much Sugar Is in a Can of Coke?

This is a messy experiment after all is done, so if you can, grab a pot that has one handle out the door. Pour a can of Coke into the pot and turn the burner on to bring the contents to a boil. All the water will evaporate leaving only the sugar content behind. Use a spoon to collect the sugar since it will be too hot for your hand to touch. Average intact of sugar for a day is 24g - 36g depending on your gender. A can of coke has 39g!

Step 5: Coke & Milk

Coke and Milk are both acidic but Coke is more so. Use a 16.9 oz bottle of coke and open the bottle to fill the bottle to the top with milk. This is also a slow process but after a day you can see the breakdown of the protein in milk, which has been curdled at the bottom of the bottle!

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Science Fair Project: How to Get an Egg Into a Bottle

How to Make a Hard Boiled Egg Go Into a Coke Bottle

An interesting science fair project that demonstrates an understanding of air pressure is putting an egg into a bottle. The result will leave an egg with a hardened shell still intact and inside a glass bottle that has a neck slimmer than the egg’s diameter. Fitting an egg inside of a bottle requires only a few household supplies. Photograph each step of the project to display on your science fair board for a well-rounded presentation.

Fill a bowl with white vinegar and place a hardboiled egg with the shell still on into the liquid. Allow the egg to soak for 24 hours. The vinegar makes the egg’s shell soft enough to go through the opening of the bottle.

Remove the egg from the vinegar and dry it with a clean paper towel.

Light four matches simultaneously and drop them into the opening of the glass bottle. Do this quickly so they burn for an extended period within the bottle.

Place the egg on the top of the bottle with the tapered end pointing upward. As the matches burn, they cause the air within the bottle to heat and expand, forcing a portion out of the bottle. When the matches burn out from lack of oxygen, the air inside the bottle cools and reduces in volume.

Observe the egg being sucked into the bottle. The reduced volume of air changes the pressure within the bottle, leaving a lower level of pressure inside the bottle than the pressure outside the bottle. The higher pressure outside the bottle forces the egg through the opening.

Leave the egg to dry for 24 hours and you will be left with a hard egg within the bottle.

Take the science project one step further by removing the egg from the bottle. Fill the bottle with white vinegar and let the egg soak for 24 hours. Dump the vinegar out and hold the bottle upside down in a sink. Run hot water over the bottle. As the air expands, it will force the egg back out of the opening.

Things You'll Need

• This science project can also be completed with a shelled hardboiled egg without the use of vinegar.

Do not handle matches without a responsible adult’s assistance or supervision.

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• "The Everything Kids' Science Experiments Book: Boil Ice, Float Water, Measure Gravity-Challenge the World Around You!"; Tom Robinson; 2001
• Do not handle matches without a responsible adult's assistance or supervision.

About the Author

Serena Styles is a Colorado-based writer who specializes in health, fitness and food. Speaking three languages and working on a fourth, Styles is pursuing a Bachelor's in Linguistics and preparing to travel the world. When Styles isn't writing, she can be found hiking, cooking or working as a certified nutritionist.

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Find Your Next Great Science Fair Project! GO

Use a giant cell—a de-shelled chicken egg—to explore the comings and goings of cellular substances.

• Several chicken eggs
• Large container, such as a wash basin or large bowl
• Pencil and notepaper (or similar) for recording information
• Several substances in which to soak or bury the de-shelled eggs, such as distilled water, dry salt or saltwater solutions, colored water, corn syrup, rubbing alcohol, cornstarch, or baking soda
• Containers to hold the soaking eggs
• Plastic wrap (not shown)
• Masking tape and marker for labeling containers
• Optional: nitrile or latex gloves for handling eggs, glass jars or other small objects to hold down floating eggs

• Determine the treatments you’ll be using on your eggs, and prepare the substances you’ll need. You can make salt-water solutions by dissolving different amounts of table salt in containers of water (e.g. 100g, 200g, 300g of salt (NaCl) per liter). You can make solutions of food coloring by adding a few drops of each color into containers of water. Remember to label your containers as you work.

Use a scale to find the mass of each de-shelled egg before treatment. Record the result on notepaper.

Place one egg in a labeled container and cover it with your chosen treatment. (If the egg floats, you may use something to hold it down, such as a glass jar; see photo below.) Repeat for each of the remaining treatments. Be sure to set aside an untreated "control" egg. After taking its mass, cover the control egg with plastic wrap, and set it in a container alongside the treatment eggs.

Place the treatment containers somewhere they can sit for at least a day at room temperature. Observe any changes that occur in the eggs during the first hour or so of soaking and record your observations.

Observe any changes in the color, size, or shape of your experimental eggs. Record your observations. Then, gently remove your sample eggs from their treatments to measure and record the mass of each one (see photo below). Remove the plastic wrap from the control egg and measure its mass too. Calculate the percentage change in mass for each egg by dividing the final mass by the starting mass and multiplying by one hundred percent.

In a separate bowl, carefully dissect the egg by piercing the membrane. Record your observations.

How did each egg change? Did its mass increase or decrease? Do you see anything in common with the treatments that enlarged the eggs? Which treatments made the eggs shrink, and which did not?

In general, the most dramatic changes to the mass, color, and shape of the eggs will occur within the first 24 hours of the experiment. Eggs submerged in corn syrup will have lost considerable mass and have the appearance of flabby sacks. Eggs soaked in distilled water will gain mass and appear dramatically swollen. Eggs in dilute salt solutions will gain mass, and even those in very concentrated solutions might gain mass. Eggs buried in salt or other dry media should lose mass.

The de-shelled eggs serve as good models of human cells. After the eggshell is removed, a thin membrane (actually, two membranes held tightly together) remains. This membrane, like those in human cells, is selectively permeable, allowing certain substances to pass through while blocking others.

Substances that can pass easily through the membrane of the egg will follow the principles of diffusion. They will move through the membrane from the side where they are at a higher concentration to the side where they are at a lower concentration (click to enlarge the diagram below). This movement will continue until the concentration on both sides is the same. While random molecular motion will cause individual molecules to continue moving back and forth across the membrane, the overall concentration on each side will remain in equilibrium, with equal concentrations on both sides.

The egg’s membrane is permeable to water. Movement of a solvent (such as water) across a semipermeable membrane from a less concentrated solution to a more concentrated one is called osmosis . When an egg is soaked in a solution that has a higher solute concentration (the relative amount of dissolved stuff) than the solute concentration inside the egg, water moves out of the egg and into the solution (see diagram below).

As a result, the egg loses mass and ends up looking deflated. An egg naturally has a lot of stuff inside, so the outside solution has to be very concentrated for this to happen. That’s the case when an egg is treated with corn syrup or buried in salt. By contrast, when an egg is treated with distilled water, or a dilute salt solution, the solute concentration is higher inside the egg than out, so the water moves into the egg, increasing its mass. It may be easier to think about osmosis in terms of water concentration rather than solute concentration. If the solute concentration is high, then the water concentration will be low by comparison.

Rubbing, or isopropyl, alcohol is at least 70% alcohol and therefore less than 30% water. This should cause water to move from the egg into the solution, and the egg should lose mass. In addition, the egg may appear white and rubbery. Alcohol that diffuses into the egg can denature the proteins, unraveling their three-dimensional structure and causing them to coagulate or join together. Egg proteins turn from translucent to white when they are denatured. In cooking, temperature is used to denature these proteins, but you may have noticed that alcohol has also "cooked" the egg and caused it to look hard-boiled.

The plasma membranes of your cells behave much like those of the egg. All of the trillions of cells in your body are like busy seaports with materials coming in and going out. Water, oxygen, and nutrients must pass through the plasma membrane into your cells, and wastes must leave. When the concentration of oxygen is higher in your lungs than it is in your blood, for example, the oxygen diffuses into red blood cells through capillary walls. Your flowing blood then transports that oxygen to your tissues. From there, the oxygen diffuses into other cells to be used in cellular respiration. Through a similar process, water in the stomach moves into the bloodstream and is then carried to the cells, where it supports a variety of essential bodily functions.

Predict what would happen if you placed the shrunken eggs in plain water overnight. Do the experiment and explain your results.

In this activity, not only can you measure how much material moved into or out of a treated egg, but you can also chemically determine whether molecules moved across the membrane. If you break the egg into a dish, or save some of the soaking solution, you can use chemical tests to see what’s there. For example, you can use Benedict’s solution to test for simple sugars, iodine to test for starch, or Biuret solution to determine whether or not protein exited the egg as it soaked.

When using this activity with large groups of students or multiple classes, have each group apply only one treatment, and then analyze the data collected from all groups. Having each small group design an experiment with one egg will allow you to do the activity with fewer eggs per class, and collecting several sets of data will enable students to identify any outliers.

This Snack is an excellent activity for introducing diffusion, osmosis, and the semipermeability of membranes and allows learners to engage in the NGSS Science and Engineering Practices. By collecting data from multiple classes, you can facilitate a discussion about what and how much data is necessary to count as evidence. Students can also use the evidence about what and how much material moves into and out of the egg to formulate a revisable model about how osmosis occurs and what might prevent or allow molecules to move through membranes. By incorporating related activities, such as the Cellular Soap Opera Snack, students can form a more complete conceptual model of the cell membrane and how molecules move along concentration gradients.

Note that it’s also important to discuss the idea that models such as this one have limitations. There are structural differences between the membranes of chicken eggs and human cells that result in differences in permeability. Some of the molecules that pass through the egg’s membrane in this activity would not pass through a human cell membrane because of their size (such as cornstarch) or their charge (such as Na + and Cl - from the salt). 

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Are you looking for fun and creative science ideas to do with the kids? Well, yay! Because that’s what this blog is all about …

Have a browse through our most recent posts below.

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Join us, as we attempt, experiment and stumble our way through fun science at home.

  Thanks for stopping by. We love having you here. Go science kids!

10 Comments

Saved as a favorite, I really like your website!

Thanks Flora!

Keep this going please, great job!

Yeah,I would say the same. Great job!

My name is Erin Marie. I am a fellow blogger. I LOOOOVE your website and use it all of the time with my daughter. So, I nominated you for the Liebster Award.

You can view the nomination post here: https://luckyinluv.com/liebster-award

Thank You! Erin Marie

Thank you for your exciting, educational and easy-to-follow experiments and activities. I help run a boys’ club (ages 7 to 11) and we are always looking for activities which will make their brains work harder while their hands have a bit of fun! I am looking forward to receiving your emails with more of these science activities.

You take experiments from Home Lab App in Google play

I haven’t heard of that app, so no, I haven’t taken any of their experiments. Although, many of them are ‘common’ science experiments that are available in many science textbooks and the like, so there’s likely to be unintentional double up.

is there a way to print the snowflake activity directions without having to print 20 pages? Thanks!

Ah, yes, I’m working on adding an easy ‘print instructions’ feature. sorry it’s not up and running yet, but watch this space!

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Nourishing My Scholar

Easy Rubber Egg Experiment

January 25, 2017 by Erin Vincent 8 Comments

Easy Rubber Egg Experiment! Yes, easy! It only takes about 5 minutes to set up and then a week’s worth of observations. Come see how easy it really is!

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The children and I had seen a few different rubber egg experiments online and wondered if it was really all that it was “cracked” up to be…see what I did there? The basic idea is to place a raw egg in a container of vinegar. You let the egg sit in the vinegar for a week and at the end of the week, the egg is rubbery. “But why use vinegar?” the kids asked. “Can’t we use other stuff and still get rubbery eggs?” And thus our easy rubber egg experiment was born!

We decided to experiment with ingredients to see if we would still get the classic rubber egg. Here’s what you’ll need….

• We gathered different solutions from our kitchen including: vinegar, Coke, corn syrup, salt water, and olive oil.
• Raw eggs (1 egg for each different solution that you use)
• Containers (we used glass mason jars because we wanted to be able to observe our eggs over the course of a week)

We poured enough of each solution to cover each egg and then placed the lids on the mason jars. We added a bit of blue food coloring to the salt water and orange food coloring to the olive oil so it would be easy to identify. Easy, right? Then we waited….and waited….and waited. While we waited we checked the eggs each day to see if we could observe any differences. We noticed the egg in the vinegar was always covered in bubbles.

After the 7 days were up our son took each egg out of its jar.

• The vinegar egg had lost it’s shell was rubbery and also larger than when the experiment first took place.
• The corn syrup egg was developing a rubbery texture too but seemed slightly smaller than when the experiment took place.
• The Coke egg still had its shell and had only been dyed a brownish color. No other change was noticed.
• The salt water egg had its shell and had been turned a bluish color.
• The olive oil egg still had its shell.

What We Learned from the Easy Rubber Egg Experiment

An egg shell is made of calcium carbonate. The vinegar is an acid. So when you place the egg in vinegar you see bubbles forming because the vinegar is breaking down the shell of the egg. The egg became larger because the breakdown of the shell allowed the vinegar to enter the egg itself and expanded it.

The children then decided to put all of the eggs back in vinegar only for a few more days to see what would happen….

• The vinegar egg remained the same rubbery egg.
• The corn syrup egg was even smaller than when the experiment first took place and it looked like a prune!
• The Coke egg became rubbery.
• The salt water egg became rubbery.
• The olive oil egg became rubbery.

What we learned from the Easy Rubber Egg Experiment (Phase 2)

We learned that eggs shrink in corn syrup due to osmosis! Osmosis is the process by which water moves in or out of a cell through the cell’s membrane. During osmosis, water moves from an area of higher concentration to an area of lower concentration. Corn syrup has the opposite effect as the vinegar because there is comparatively more water inside the egg than in the corn syrup. Instead of the egg swelling with both its own water and the vinegar which enlarged it, the corn syrup pulled the water out of the egg and into the syrup!

After learning so much cool stuff about rubber eggs, it was time to splat them….I mean bounce them! Seriously though, see how much they’ll bounce before they go SPLAT!

I hope you enjoyed seeing just how easy rubber egg experiments can be.

You might also like these kids books on science and experiments!

About Erin Vincent

Erin is a writer, blogger, and homeschooler to two intense kids. She loves nature, farm life, good books, knitting, new pens, and hot coffee. Erin is a contributing writer for Weird Unsocialized Homeschoolers. Her work has also been featured on Simple Homeschool and Book Shark.

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Egg and Toothpaste Experiment (Learn Importance of Brushing Your Teeth)

• November 4, 2020
• 3-4 Year Olds , 5-6 Year Olds , 7-9 Year Olds , Rainy Day Science

This wonderful experiment using eggs and toothpaste helps parents and teachers to teach children how important is brushing teeth.

Most parents out there have had difficult times to make your child’s brushing time fun and excited!!

Also, many parents experienced annoying times to stop their kid from grabbing artificial sweeteners like soda, candies, etc.

If you are one among such parents whose warnings just remain as warnings which are not put into serious action by your child, here is the super-fun activity for you!

Egg and Toothpaste Science Activity

Objective: To observe how eggshell is protected by tooth paste and learn how tooth reacts to acids and stain.

Time: The activity requires 24 hours to show stain on eggs.

Inspiration: One day, my younger daughter (who is 5 years old) came up with a question “Mumma! How come our teeth becomes stained and turn into yellow colored?”

Immediately, I asked her what is wrong with her teeth.

She replied, “Mumma! I am completely fine but today in my school, one of my close friends was suffering from teeth pain and I observed her teeth were yellow tinted.”

Then, I understood the complete picture and turned her question as a great opportunity to show her how important is brushing our teeth using toothpaste.

For this activity I used eggs and toothpaste to show her importance of brushing.

Why eggs? Eggshells are having the same material as of our tooth and bone composition. So, eggs make a great ingredient in this activity.

Appropriate For Age Group: this fun science investigation is perfect for preschoolers, kindergarten, and elementary children. Toddlers can enjoy and try to understand the results but they may not exactly know the science involved in this experiment.

Materials Required: For your surprise, this super cool egg and tooth paste science activity requires 3-4 ingredients from the fridge of your kitchen. Do you want to know what those simple supplies are!? Have a look here:

1) 4 plain and raw eggs

2) Tooth Paste (any kind of toothpaste right in your home is fine)

3) Coca Cola

4) Black Coffee

That’s it! Just collect these items from your kitchen and get ready at the experiment table to investigate eggs and toothpaste hands-on.

Simple Step-by-Step Instructions

This fun science investigation takes a few minutes to finish but we need to wait for a day or 24 hours to see the spectacular results. So, plan accordingly if you want to perform this activity either at home or in a school event.

Let us jump into the simple instructions and follow the same while experimenting with eggs and toothpaste.

Step-1: Do little Preparations

Before you start this activity, you need to help your children in making black coffee.

If your children are too young to manage burners, then prepare black coffee and directly offer them to use in the activity.

And keep four neatly cleaned transparent glasses ready! Also make sure the eggs you picked up are in good condition that means there is no breakage or leakage of egg inside contents.

Because leaking egg can damage the whole experiment results and looks messy too!

Step-2: Keep the eggs ready for the Experiment

Bring the eggs to the room temperature in order to achieve appropriate outcome.

Once you check the eggs are in good condition, ask your child to wash the eggs carefully with neat hands. And then let them dry the wet eggs using paper or cloth napkins.

That’s all! Your eggs are ready to go on to the experiment table.

Step-3: Cover the eggs with Toothpaste  

Ask your child to coat two plain eggs with good amount of toothpaste evenly. And the rest two eggs remain as it is. That means we are not coating these eggs with any other material.

Step-4: Arrange the Glasses for Experiment

Now pick four transparent glasses and fill two glasses with coke and the other two glasses with black coffee.

Make sure you are placing these glasses on a plain and flat surface such that you can avoid unnecessary disturbances and messy work during investigation.

Also, remember to fill the glasses with the respective liquids in equal amounts. If you want, you can measure and pour the liquids in to the glasses to keep the quantity equal.

Step-5: Drop the Eggs

It is time to drop the eggs into the liquids for investigation! Pick one plain egg and one toothpaste coated egg and drop them in coke filled glasses respectively.

After that pick another set of eggs i.e. one plain egg and one egg covered with toothpaste and drop into the two glasses filled with black coffee respectively.

Step-6: Allow the set-up for a day

This is so simple and easy step where you have nothing to do or investigate! Yes, ask your children to leave the experiment set-up for 24 hours completely to see the fascinating results.

Step-7: Observe the Results

Are you done waiting for 24 hours to see the outcomes? Here are the results we experienced after a long wait of 24 hours. Hahaha! Yes, waiting for 24 hours is a long wait for children to see the results.

I am attaching the results table and pictures for your reference. Just compare and see whether you also experienced the same.

Glass-1 filled with coke and plain egg got stains where the one coated with toothpaste and dropped in glass 2 with coke does not have any stains.

In the same way, the plain egg dropped in black coffee showed stains whereas the egg coated with tooth paste does not show any stains. You can see the pictures attached for your reference.

Science behind the Egg and Toothpaste Activity

Egg shell is the rich source of calcium carbonate whereas black coffee and coca-cola are acidic in nature.

When the plain egg dropped in the coke and black coffee, the acidic contents immediately start reacting with calcium carbonate and forms stains.

As this is a slow process we are letting the experiment set up for 24 hours to see best results. On the other hand, the eggs coated with toothpaste, when dropped in the coke and black coffee, the fluoride in toothpaste build a protective layer between the eggshells and acidic solutions.

The fluoride in toothpaste makes the eggshell stronger and protects it from reacting to acidic contents of coke and black coffee.

Fluoride is the natural mineral helps the outer layer of eggs and teeth become stronger naturally.

Egg-Toothpaste Science Experiment and Importance of Brushing Teeth

Eggshells denote the teeth of humans as the outer layers of both made of same material i.e. calcium. And the chemical composition of eggs, bones, and teeth are same.

So, we are representing eggshells as teeth. Coke and black coffee represents the acids caused due to bacteria in the form of plaque. Plaque is the result of constant consumption of artificial sweeteners.

So, when we brush our teeth properly using toothpaste, the fluoride content in it helps teeth from the damage of acids, cavities, stains, and plaque.

This is how we can explain and give a great demonstration on importance of proper brushing teeth with fluoride contained toothpaste.

The fluoride content in toothpaste keeps the eggshells safe from the acids present in black coffee and coke. Hence, the toothpaste acts as a strong protective layer between the acids in coke and calcium content of eggshell respectively.

Liquids rich in acids are the best liquids to dissolve egg shells. For example: Orange Juice, Vinegar, Coke, Black Coffee, and other acidic liquids. The acids in these liquids react with calcium carbonate in egg shells. Carbon dioxide is the gas released during this reaction. If you let the reaction to continue for long hours, you can observe acids dissolving the egg shells gradually and completely. Finally, the reaction leave the egg to uncover its outer layer and exposes inside contents.  

Osmosis is the process through which sudden drive of solvent particles happen from less concentrated solution to high concentrated solution. This is the same happens when you place an egg in pure water for 24 hours. The water travels from outside part of the egg through the semi-permeable membrane to the inside part of the egg. You can observe osmosis when the egg swells up after sometime the egg put in the water. Otherwise, add some food color to the water and let the egg sit for a day. You can easily observe the transmission of water through the color travel from outside to inside part of egg.  

Take a glass of coca cola and place an egg in it. Let it remain in the coke solution for 24 hours. Then, take out the egg and you can see the egg is stained. This is because the acid the coke reacts with calcium in the egg shell.

Absolutely yes! Coke contains dissolving agent in it i.e. acidic nature, which is why the egg shells dissolves completely when an egg is placed in coke solution and left for long hours. The egg shell is nothing but calcium carbonate which softens and melts on long exposure to acidic solutions like coke. You can observe this amazing chemical reaction by witnessing the carbon dioxide gas releasing as a result of reaction in the form of tiny bubbles.

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Egg in Vinegar Experiment – Make a Rubber Egg

The egg in vinegar experiment is a fun way of learning about egg structure, chemical reactions, osmosis, and the scientific method . It’s a safe and non-toxic project, so it’s perfect for young investigators. Other names for the egg in vinegar experiment are the naked egg, rubber egg, or bouncy egg. The “naked” part is easy to understand, because you’re removing the shell from the egg using chemistry. The “rubber” or “bouncy” description implies the egg bounces rather than breaks. Does it work? You be the judge!

The Chemistry of the Egg in Vinegar Experiment

Vinegar contains acetic acid (CH 3 COOH), which is a weak acid . Egg shells are calcium carbonate (CaCO 3 ). Acetic acid reacts with calcium carbonate, making calcium acetate and carbon dioxide. Here is the balanced chemical equation for the reaction:

2 CH 3 COOH(aq) + CaCO 3 (s) → Ca(C 2 H 3 O 2 ) 2 (aq) + H 2 O(l) + CO 2 (g)

The calcium acetate dissolves in water, while the carbon dioxide is a gas and forms bubbles. So, the egg shell dissolves and bubbles away, leaving a naked egg.

What You Do

All you need for this project is an egg, vinegar, and a cup:

• Cup large enough for the egg
• Food coloring (optional)

Use either a raw egg or hard-boiled egg. The advantage of using a raw egg is that you can see into the inside of the egg when you are done. The advantage of using a hard-boiled egg is that it bounces after pickling in the vinegar. The raw egg bounces a bit too, but if you use too much force it breaks open and makes a mess.

• Place the egg in a cup.
• Pour vinegar over the egg until it is just covered. It’s okay if the egg floats a bit. If you like, add a few drops of food coloring. After about 15 minutes, observe the bubbles forming around the egg. The bubbles are carbon dioxide gas. They form from the chemical reaction between the acetic acid in the vinegar and the calcium carbonate of the egg shell. You may also feel that the cup is slightly warm. The reaction is exothermic, meaning it gives off heat. The bubbles and temperature change are two signs of a chemical change .
• Wait a day. Also note that the liquid becomes cloudy or scummy. This is the dissolving egg shell.
• If you remove the egg after 1 day, use a spoon. Otherwise, a raw egg easily ruptures. At this point, if you remove the egg, you can easily rinse away any remaining shell. But, you get better results if you pour off the liquid and add fresh vinegar. This is especially true if you want a rubber egg or bouncy egg. Wait another day or two, giving the vinegar time to get all the way into the egg.
• Remove the egg and rinse it off using water.

Why Rotten Eggs Float in Water

Learn the scientific reason why bad eggs float in water, while good eggs sink.

Science Experiments to Try

Now that you have a rubber egg, what do you do with it?

• Examine the internal structure of the egg. This only works if you started with a raw egg and not a hard-boiled one. Identify the egg membrane, yolk, egg white (albumin), and chalaza.
• Compare the egg without its shell to a normal egg. Notice that the egg soaked in vinegar is slightly larger than the egg with its shell. Why is this? The reason is because water entered the rubber egg via osmosis . The concentration of salts, proteins, and other molecules inside the egg is greater than the concentration in the cup. The egg membrane is semipermeable. It allows the movement of water, but not larger molecules. So, the egg swells with water to try to dilute the inside of the egg so it has the same concentration and outside of the egg. Experiment : Predict what happens if you soak the rubber egg in corn syrup, salt water, or sugar water. Compare the size of this egg with a normal egg and a rubber egg. Corn syrup, salt water, or sugar water shrink the egg because the liquid is more concentrated the interior of the egg. Here, water leaves the egg via osmosis.
• Try bouncing the egg. In addition to dissolving the egg shell, vinegar also pickles the egg. It changes the conformation of protein molecules in the egg white. Because vinegar has a low pH, it also helps preserve the egg. Experiment : Compare how well a rubber egg bounces depending on whether you started with a raw egg or hard-boiled egg.

Can You Eat the Egg?

Eating an egg after soaking it in vinegar is not a great plan. First, it won’t taste great. Second, it could make you sick. If you must eat your experiment, soak a hard-boiled egg in vinegar in the refrigerator for a few days.

Does the Egg in Vinegar Smell Like Rotten Eggs?

Mostly, the egg comes out of this project smelling like vinegar. Vinegar pickles the egg, which preserves it. But, once you remove the egg from vinegar it starts decomposing. After enough time, if you break the egg, it will stink. The odor comes from hydrogen sulfide gas, which is a product of the decomposition reactions in the egg.

Of course, if you start the project with a rotten egg, all bets are off. Rupturing the membrane releases any trapped gases. Bounce these egg with care!

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Home » Articles » STEM » STEM Science » How to make bouncy and glowing Egg

How to make bouncy and glowing Egg

What can we do with an egg great omelet for one but did you know that this frail-looking egg is actually very durable  we will show you how to explore its properties and make a fun toy out of it in this cool egg in the vinegar experiment, article contents.

If you are looking for some fun and easy kitchen science experiment, the naked egg experiment is the right one for you. It has a great teaching power and your children will learn a lot about how cells in all living organisms work. All we need is some common kitchen supplies and we will be able to look inside of an egg, see what hides behind that thick shell and play some fun games afterward.

Anatomy of an Egg

The main parts of an egg are a shell, membrane, albumen (egg white) and yolk . 

Eggshell is made primarily out of calcium carbonate crystals (95-97%) which are connected by a protein matrix. That protein matrix gives strength to a shell, without them shell could break apart. Eggshell is protecting an egg from mechanical damage but also bacteria and dust.

The membrane is made out of proteins and it protects the inner part of an egg from bacterial infections. There are actually two membranes: outer and inner and they are surprisingly strong.

Albumen or egg white consists of 40 different proteins in addition to water (90%). Its main purpose is to provide additional nutrition to the embryo as well as protecting it. The yolk is the main source of nutrition for an embryo. It consists of proteins, vitamins, minerals, fat and some water.

The science behind the naked egg experiment

If we soak an egg in vinegar, we will start an acid-base reaction. The acetic acid from vinegar reacts with calcium carbonate (base) from an eggshell. Products of that reaction are calcium acetate, water , and carbon dioxide . 

You can notice bubbles forming on the eggshell surface, that’s the sign of newly created carbon dioxide. After some time, the shell is completely dissolved and all that keeps an egg together are its membranes.

After the hard, outer shell is dissolved, the egg becomes translucent (hence, the name “naked egg”) and when we put an egg on the source of light, it looks like it’s glowing and we can see the yolk inside. All that is keeping the egg together is a thin membrane called a semipermeable membrane.  

This is important for the next side effect of putting the egg in vinegar. You will notice how an egg becomes a little bigger. That is because of some of the water in the vinegar solution (even the strongest household vinegar is made from more than 80% of water) traveled trough the egg semipermeable membrane to equalize the concentration of water inside and outside of the egg. The process of water traveling through a semipermeable membrane is called osmosis and is characteristic of all living beings.

On the other hand, if we put our naked egg into corn syrup, the egg will shrink. That is because corn syrup has a lower concentration of water and water would move from inside of an egg to equalize the water concentration.

If you are interested in watching how we did it, check the video for making the bouncy egg at the start of the article. Or if you prefer reading, continue with step by step instructions below.

Materials needed for naked egg experiment

• Source of light (flashlight, mobile phone)

Instructions for bouncy glowing egg

• Carefully put an egg into a glass.
• Pour vinegar over it, it should cover an egg completely. Instead of vinegar, we can use cola, rubbing alcohol or orange juice since they are acidic enough. They should produce the same effect. Leave it for at least 24h, depending on vinegar strength (9% takes 24h). If the egg is fresh it will probably rise up, so try to rotate it gently using a spoon. 
• After 24h, remove an egg from the solution. Rinse it with water.

Congratulations! You now have a rubbery, transparent egg. This is also commonly called the naked egg.  Experiment with it! How high can it bounce? Can it survive 1m fall? We advise you to do your experiments outside! 🙂

If you put your naked egg on the source of light, you will see a cool glowing egg! In addition to that, you can investigate the anatomy of an egg, since you can see parts of an egg very clearly through the transparent membrane.

What will you develop and learn

• Anatomy of an egg
• Chemical reactions
• Scientific method

Don’t forget to experiment! Discover new things you can do with your egg and keep notes on all your findings. That’s the best way to learn! We would like to hear all about your experiments, so share in a comment.

And if you are interested in more similar STEM activities, check out a simple but great orange density experiment . Also, be sure to check how to demonstrate osmosis with gummy bears and learn about pressure with can crush experiment .

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• STEM Activities /
• Crazy chemistry experiments /

Egg in Vinegar Experiment

Want to see a chemical reaction in action? With this egg in vinegar experiment, we observed and followed a regular egg through a transformation to become a bouncy egg. You can too with just a few repurposed ingredients you may have around the house for Easter!

This experiment allows you to see how two common household materials react — eggshell and vinegar. When these materials come in contact, a (safe) chemical reaction takes place and creates new compounds. This easy experiment is great for children to do on their own, and fun to observe how the egg changes over time.

Want to explore more kitchen science experiments? Explore the tastier side of learning with Science of Cooking: Ice Cream from the KiwiCo Store !

Ages: 5 - 11

Materials you'll need

Step-by-step tutorial.

Carefully put your egg into a jar and fill the jar about three-quarters full with the egg completely submerged in the vinegar.

You should be able to see bubbles form around the egg immediately. Where do you think they come from? Wait 48 to 72 hours. We found it exciting to check in on the egg as we went as the egg grows and changes over time.

After waiting, use a spoon to take out the egg. Carefully rinse it thoroughly under the faucet using warm water.

Your egg is now ready to bounce! Hold your egg about 3 inches from the table and gently let go. If bounced too hard the egg will break. This means you'll get to see the membrane of the egg!

Final result!

Compare your transformed egg to a regular egg. What do you think happened to the eggshell? What other differences can you observe? What's Going On? If you look closely at the egg while it's submerged in the vinegar, you can see bubbles forming on the surface. Those bubbles are full of carbon dioxide, just like the bubbles in a glass of soda. You're seeing a reaction between a compound in the eggshell (calcium carbonate) and an acid in the vinegar (acetic acid). This reaction creates carbon dioxide (and some other things) and breaks down the eggshell in the process. The membrane underneath the shell doesn't react, so it's left behind. Once the shell is completely gone, all that's left is the flexible membrane, giving you a bouncy "rubber" egg!

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