Bouncing Egg/Acid Egg Bath

 

The Bouncing Egg experiment will show how the calcium carbonate that makes up the egg shell reacts to the acetic acid in the vinegar, producing carbon dioxide bubbles and dissolving the egg shell.

 

Supplies needed:

  • Hard-boiled egg
  • Vinegar
  • Jar with lid

Procedure:

  1. Gently set the egg in a jar.
  2. Pour in enough vinegar to cover the egg.
  3. Observe what forms on the shell. (The bubbles that form on the surface of the egg are carbon dioxide.)
  4. Check the egg in about 4 hours and every hour thereafter.
  5. Remove the egg when the shell is soft. It should take about one full day.
  6. Amaze your friends by bouncing the egg.

Skills: Observing, inferring, predicting, communicating, formulating hypotheses, identifying and controlling variables, experimenting