egg and vinegar experiment

Enjoy our range of fun science experiments for kids that feature awesome hands-on projects and activities that help bring the exciting world of science to life.

What happens if you leave an egg in a glass of vinegar? Let’s find out with this easy science experiment for kids.

Learn about simple chemical reactions and have fun with the results!

Science Kids ©  |     |     |     |     |     |     |     |     |     |     |     |     |     |  Updated: Oct 9, 2023

Eggs are often thought of as delicate and fragile, but this activity will show that with a simple chemical reaction we can give them a bit of bounce.

Printable downloads

Follow these steps….

Think and talk about…

• What can you see happening?
• Did you see any bubbles appearing?
• Why do you think changing the vinegar halfway helps to speed up the process?

Investigate…

• What happens if you give the egg a gentle squeeze?
• How high can you drop the egg from before it breaks?
• What happens if you put the naked egg into other liquids? Try putting it in water or golden syrup and see what happens.

What’s the science?

This membrane is surprisingly strong, and the egg can be dropped from a small height without damaging it: it can bounce.

The membrane is ‘semipermeable’: water can pass through it, but substances dissolved in the water cannot. When the egg is immersed in golden syrup, a strong sugar solution, water leaks out of it.

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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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Bouncy Egg Experiment

February 10, 2021 By Emma Vanstone 8 Comments

Eggs with no shells are definitely one of the things my children find most intriguing. I’ve made bouncy eggs for nursery children to look at and for secondary school children to use as part of an osmosis experiment .

This fun bouncy egg experiment is great fun for kids of all ages and fascinating for adults too!

I also have a huge collection of egg experiments you might like.

What happens to an egg when you drop it? It smashes.

So how can you make an egg bounce?

How to make an egg bounce

Place an unboiled egg in a container of vinegar for about 24 hours. The vinegar should completely cover the egg. If you want to remove the shell faster, take it out of the vinegar every couple of hours and rinse the egg under cold water while gently rubbing away the shell.

Once the whole shell has dissolved, you have a naked egg which should bounce. Some eggs seem to break more easily than others, so you could try experimenting with different kinds of eggs to see if a certain type or size makes a difference.

To bounce your egg, drop carefully from a low height, the egg should bounce up from the surface. Can you measure at what height it breaks? Or try bouncing on different surfaces?

How about drawing a table to demonstrate your results?

If you don’t want to break the eggs, how about shrinking an egg ?This is a fantastic way to learn about osmosis .

More Egg Experiments

Use eggs to learn about tooth decay !

Find out why an egg can seem to be unbreakable .

Make an egg shell bridge .

Key Stage 1 Science

Investigative skills.

Ask the child to predict if an egg can bounce using past experience of the properties of the shell.

Obtain and present evidence

Did you draw a table to demonstrate how high the egg bounced?

Consider and evaluate evidence evidence

Were the results as expected?

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Last Updated on March 2, 2022 by Emma Vanstone

Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

January 30, 2013 at 2:24 pm

Oh my what fun!!! What a brilliant experiment.

Thanks for sharing on Kids Get Crafty.

February 07, 2013 at 11:20 pm

VERY cool! I love stretching their minds =-)

Thanks for linking up to TGIF! I hope to see you again tomorrow! Beth =-)

April 02, 2013 at 7:20 pm

Love this! Please can you explain the science behind this? Many thanks!

April 03, 2013 at 3:06 am

That’s really AWESOME! That’s a really great experiment to do!

April 03, 2013 at 4:16 am

I have not ever heard of someone able to make a egg bounce. How did you get the idea and how long did it take you to do this? I have never done any type of experiment like this before so I was really interested when I saw this post about the egg bouncing.

March 19, 2017 at 11:21 pm

My name chef

June 15, 2018 at 7:31 pm

This was a grate experiment my kids really had fun with it!

March 27, 2023 at 1:14 pm

Cool! I’ve always wanted to make a bouncy egg – now I have! It’s very fun to play with 🙂

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Egg in Vinegar Science Experiment – How to Make a Bouncy Egg

Mar 31,2023 by Edulab

Are you ready to take your egg game to the next level?

With a few simple supplies and a bit of patience, you can turn a regular raw egg into a bouncy ball-like object. This is a great experiment to do with kids or for anyone who loves a good science experiment.

Supplies needed:

• Glass or Jar
• White Vinegar

Instructions:

Step 1 – Get a raw egg and carefully place it into a glass or jar. Then fill the glass with white vinegar until the egg is completely submerge

Step 2 – Leave the egg in the glass for 2-3 days*. Each day, check back on the egg. Make some observations.

• Do you notice any changes to the egg?
• Is anything happening to the vinegar?

Write down your observations each day.

After about 3 days, the egg will start to become translucent, and you will know it is ready to move to step 3.

*You can speed up the process by changing the vinegar halfway through.

Step 3 – Carefully remove the egg from the glass and rinse it under some tap water. While rinsing the egg, gently rub the outside of the egg, and the white film will come off, leaving you with a translucent egg. Examine the egg and make some observations.

• Does the egg look different from when you started the experiment?
• Does the egg feel different?
• Perhaps you notice that it feels rubbery (like a bouncy ball).

Write down your observations.

Step 4 – Over a plate or other container, lift the egg 1-2 inches in the air, let go, and watch it bounce. Make some observations.

• What happens to the egg?
• Does it bounce?
• Is this different than what you expected?

Step 5 – When you are ready for some messy fun, lift the egg a little higher in the air and let it go… SPLAT!

So, what’s happening here?

The vinegar in the glass is acetic acid, which reacts with the calcium carbonate in the eggshell, producing carbon dioxide gas. The carbon dioxide gas creates the bubbles you see forming on the eggshell when you first place it in the vinegar. Over time, the reaction causes the eggshell to dissolve, leaving behind the egg’s membrane. This membrane gives the egg its rubbery texture, and the lack of a hard shell allows the egg to bounce like a ball.

In conclusion, the Egg in Vinegar Science Experiment is a fun and educational way to explore chemical reactions and the properties of eggs. Kids and adults alike will love seeing the transformation of a raw egg into a bouncy ball-like object. Just be prepared for a little bit of messiness!

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Science Project Ideas

Egg in Vinegar Experiment

The egg in vinegar experiment, though pretty simple, gives your child the foundation knowledge on reactions between acids and bases. It goes on to change the chemical composition of an egg, making it rubbery on being dipped in vinegar for a few days. There are minor changes in the size of the egg too which can be measured over the period and plotted in a graph.

Rubber Egg Science Project

On soaking an egg in vinegar, the liquid dissolves its hard shell while exposing the thin membrane that is the only thing that holds the egg yolk and white.

• White vinegar
• A clear jar or tall glass
• A big spoon
• Place the egg in the jar or glass such that it does not touch the walls of the container.
• Pour vinegar so as to cover the egg completely.
• Watch the egg closely. You should see bubbles forming on its surface. Note down your observations.
• Let the egg soak in the vinegar for one day.
• Use the spoon to scoop out the egg from the vinegar. You need to be very careful while doing this as the shell should already be partially dissolved by this time, leaving the egg tender.
• Now pour out the old vinegar, put the egg back in the container and cover it with fresh vinegar.
• Let the arrangement sit for another week.
• Scoop out the egg and rinse it carefully.
• Now you are left with an egg without a shell. Though it still looks like an egg, it has a translucent covering membrane that flexes when you squeeze it. If you shake it, you can see the egg yolk sloshing about in the egg white. You can even bounce it gently over hard surfaces.

Things You Can Try

• Perform the experiment on a hardboiled egg
• Try other variations of vinegar such as concentrated or apple cider vinegar. You can also replace vinegar with vinegar and baking soda solution, coke, corn syrup, salt water, tap water, etc. and look for any difference in the results.

Egg and Vinegar Experiment Video

Explanation for the bouncy egg.

Eggshells are made of calcium carbonate (chemical formula CaCO 3 ) while vinegar is acetic acid (chemical formula CH 3 COOH). The two chemically react to separate the calcium and carbonate parts. The calcium ions freely float in the vinegar while the carbonate ions form carbon dioxide that you can see in the form of bubbles.

Since the egg membrane is semi-permeable, it allows some of the vinegar to enter the interiors by osmosis, a process by which molecules of a solvent pass through a semi-permeable membrane to land themselves in a more concentrated solution from a less concentrated one. This makes the egg bigger and more delicate when you handle it. If the membrane ruptures, the insides of the egg will spill into the vinegar.  After the experiment, if you leave the nude egg exposed to air, the atmospheric carbon dioxide reacts with the leftover calcium in the egg to make it regain rigidity after some time.

In the lab, it can also be used as a tool to grow dental health awareness in children. Teachers can explain that a similar reaction occurs when the bacteria sticking to their teeth create acids on reacting with sweets or coke (soda) when they have it. Their enamels get destroyed in the process. The fun yet educative activity has all the ingredients to become a favorite science fair project.

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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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Egg in Vinegar Experiment

Did you know you can study cells by examining eggs? Chicken eggs are essentially one big cell making it much easier to study than the teeny tiny cells that make up our body. With this cells unit study on cells we examined raw eggs to learn about their parts. This was a great introduction into the concept of the cell, but we decided to take our study of the egg up a notch. It was time to do an egg in vinegar experiment and the always fun rubber eggs study.

Naked Egg Experiment and Cell Study

What you will discover in this article!

Disclaimer: This article may contain commission or affiliate links. As an Amazon Influencer I earn from qualifying purchases. Not seeing our videos? Turn off any adblockers to ensure our video feed can be seen. Or visit our YouTube channel to see if the video has been uploaded there. We are slowly uploading our archives. Thanks!

To start off our unit study we discussed cells and how they make up all living things. Then it was time to get hands on! We decided to bring some chemistry to our biology lesson and do a simple experiment – the egg in vinegar experiment.

This science experiment has a few names: Rubber Egg Experiment, Bouncy Egg Experiment, Naked Egg Science Experiment or Egg in Vinegar Experiment. No matter what you call it, this is one of our all time favourite simple science experiments. And it pairs perfectly with an egg cell study.

With this experiment we remove the shell of a raw egg with a chemical reaction, leaving us with a naked egg. The inside of this naked egg provides an excellent opportunity to study cells.

Here is a Quick Video Showing the Process

Hands on exploration .

We kicked things off with each child taking an egg and exploring. We encouraged their curiosity as they explored the shell, how fragile the eggshell is, and what it looks like when cracked open.

Surprisingly, we were able to remove some of the shell from one of our eggs revealing the membrane! This made the kids even more excited about our experiment to create naked eggs.

To remove the shell of a raw egg we need to do a little chemistry experiment. For this you will need:

• Eggs (regular eggs are perfect)
• White Vinegar
• Mason Jars (other wide mouth jars or plastic cups work too)
• Food Colouring
• Large plates or bowls

Extra items you may want available for further investigations:

• Magnifying glass
• Kitchen scale
• Fabric tape measure
• Towels or protective covering for the area while exploring with the naked eggs

Start by testing to make sure your eggs will easily fit into (and out once enlarged) easily. I recommend using wide mouth mason jars for at least one of the eggs so kids can really see the reaction. But if you want to do lots of eggs you can do them in large plastic cups or even do big batches in large bowls.

I recommend doing extra eggs. Some may not survive the experiment and even once the shells are removed the membranes are still quite thin and easy to break. Having lots of naked eggs will provide kids with plenty of opportunity to explore and learn with the resulting bouncy, rubbery eggs. 

Set the egg carefully in the container, pour vinegar over the egg until it is submersed. The egg may float, this is OK. Add a little food coloring to the vinegar. Now let it sit for 24 hours.

Bubbles form immediately on the shell as the chemical reaction begins. These carbon dioxide bubbles are formed by the vinegar reacting to the calcium in the egg shell.

After about 24 hours you will end up with foam on top of your vinegar and the remaining liquid is mostly water. You will end up with a foam on top and eventually you will have only liquid water left.

After 24 hours drain off the liquid and replace with fresh vinegar. You can also add more food colouring if you wish. It is very important to replace the vinegar to ensure there is enough acid for the chemical reaction to finish.

Tip – Getting Vibrant Colours

To get really vibrant colours in your Bouncy Eggs, add a few drops of gel food colouring to the initial vinegar soak. Gel colouring is much more intense in colouration. Then let it soak for 24 hours.

We then soaked our eggs in plain vinegar for the second soak. And our eggs came out very saturated in colour.

What is the Chemical Reaction When You Place an Egg in Vinegar? 

Here is the chemical reaction:

CaCO 3 + 2 HC 2 H 3 O 2   →  Ca(C 2 H 3 O 2 )2 + H 2 O + CO 2

To break this down you have:

Egg Shell (Calcium Carbonate) + Vinegar (acetic acid) → Foam Floaties + Liquid Water + Carbon Dioxide Gas Bubbles

The result – naked eggs.

After another 24 hours (2 days in total) your naked eggs should be ready! Carefully drain off the liquid and rinse your eggs under a gentle stream of water.

The membrane of the egg is still quite thin and fragile. So handle with care and do it in a place that is easy to clean!

Studying Naked Eggs

Start by letting the kids handle the eggs. their curiosity should lead them to lots of neat discoveries. Some questions you can ask are:

• What do you notice about the eggs?
• How do the eggs from the vinegar experiment feel compared to eggs still with their shells?
• Can you see anything moving inside? Try holding it up to a light or flashlight.
• How does the size of the naked eggs compare with eggs that have not been through the chemical reaction?

Why does the egg feel rubbery after being in vinegar?

Egg shell is basic and vinegar is an acid. When you place an egg in vinegar it reacts causing the shell to dissolve leaving only the rubbery membrane holding the egg together. If you are lucky enough to get some of the shell off a normal raw egg, you can see the membrane.

Bouncing Eggs

My kids had a great time bouncing eggs in a large bin. As long as you don’t add too much force, you can bounce a raw egg. So cool!

What can you see inside naked eggs?

Hold the eggs up to a flashlight or bright light and move the egg around or gently squeeze it. You should be able to see the yolk and other parts inside the egg floating around.

Why does the egg get bigger in Vinegar?

Did you notice the eggs are larger than before you placed them in the vinegar? This is why we recommend using a wide mouth jar. Otherwise your naked egg could get stuck in the jar! But why does this happen? It’s because of a process called osmosis. Through osmosis some of the liquid (water) moves through the semi-permeable membrane into the egg. It does this until it reaches an equilibrium between the amount of water inside the egg membrane and the surrounding liquid. If it didn’t stop at equilibrium the egg would get so large it would eventually pop! Since there is no hard shell to keep the egg small, it expands and grows.

Learn more about Osmosis with our Rainbow Water Beads Experiment or Gummy Bear Experiment .

Getting Inside – Studying Cells with Eggs

I recommend working over a large bowl or plate as kids explore the eggs. Undoubtedly, some will break. This isn’t the end of the world though, it just means it is time for some new lessons on cells.

If you don’t have any broken eggs take a knife or tooth pick and gently poke the egg to rupture the membrane.

The food dye travels through the membrane into the egg white (this is part of the osmosis process we discussed that also caused the egg to grow), but a special membrane around the yolk stops the dye from traveling into the yolk. This is a great visual for permeability and osmosis.

But closer inspection shows that some very special parts of our egg have taken in quite a lot of the dye. The chalaza, stringy bits on either side of the yolk that help to hold it in place, and the blastodisc, a circle in the middle of the yolk, this is where the sperm enters to fertilize the egg and is the nucleus of the egg (just like a cell!).

Dying the egg makes it much easier to see all these parts of the egg compared to when we just cracked open a raw egg. Now kids can see the cells and structures more clearly.

Digging Deeper Science Activities

This is such a fun experiment, why not take it further with some scientific investigative studies? Answer questions like:

What happens if you let the eggs soak in vinegar for a week instead of only 2 days? Compare the differences.

What happens if you boil the egg before placing it in vinegar?

What can you change in your experiment to make the resulting egg more bouncy and less prone to breaking?

Compare before and after. Take measurements, weights and work out how much the eggs changed during the experiment.

What happens if you take a naked egg and place it in corn syrup? (Tip! The result has to do with the process of osmosis).

Explore osmosis further… What happens if you soak a naked egg in water?

Don’t have time to do all of these experiments? Use your critical thinking skills and lessons learned from this experiment to predict what you think will happen. Create your hypothesis then do some research to see the answer when you have time, either by experimenting yourself or reading about experiments done by others.

Rubber Eggs with a Halloween Twist – Monster Eyes!

Looking for a fun twist on this activity for Halloween? Why not make a bowl of Monster Eyes ! The kids LOVED this Halloween Egg in Vinegar project.

Looking for even more exciting egg science and STEM activities? Why not try:

Creating an Egg Crystal Geode (so gorgeous!)

An Oobleck Egg Drop Challenge

Or check out all of our Egg Science Projects for even more inspiration!

More STEM Activities

Naked Egg – Egg in Vinegar Science Experiment

Learn how to make a rubber egg with this classic chemistry experiment.

• 2 cups Vinegar
• 10 drops Food Colouring

Instructions

Carefully place the egg in the jar using the spoon. Cover the egg with vinegar (about 1 cup, just enough to cover it).

Add 4 or 5 drops of food colouring.

Let sit for 24 hours.

After 24 hours, carefully drain off the liquid.

Cover with fresh vinegar (add a bit more food colouring if you wish).

Let sit for another 24 hours.

Remove from vinegar solution and rinse gently with water.

Play and explore your rubbery, squishy, bouncy, naked eggs!

Bubbles will form while the egg is soaking in the vinegar. This is the chemical reaction taking place that removes the shell of the egg, leaving just the membrane. Encourage your kids to explore their naked, rubber eggs as they learn about chemical reactions and osmosis. Examine the eggs with magnifying glass or flashlight. Try bouncing the eggs on a tray (be prepared, some may break!). Break open the eggs to learn about the parts of cells. Dig deeper by measuring the chemical reaction and exploring how osmosis works. Most of all, have fun with your rubber eggs! Learn more about the chemistry and extension activities in the article. 

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