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.

  1. Ages: 5 - 11

  2. 2+ hours

  3. Messy


Materials you'll need

Step-by-step tutorial

  • Step 1

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

    Photo reference of how to complete step 1

  • Step 2

    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.

    Photo reference of how to complete step 2

  • Step 3

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

    Photo reference of how to complete step 3

  • Step 4

    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!

    Photo reference of how to complete step 4

  • 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!

    Photo reference of how to complete step 5

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