Number of players:
What you need
- half a cup of white vinegar
- 1 x egg
- 1 x drinking glass
Pour the vinegar into the glass
Put the egg in the vinegar.
Leave it for at least two days. Keep an eye on it, watch how it changes.
After two days, take it out. The shell will have dissolved. You can carefully, gently bounce it from a low height.
Hints and tips:
Whatever you do, don’t try bouncing it from a great height like we did (see video!) It’s still an egg inside, not a super ball!
Why is it so?
A chemical change takes place.
The vinegar, which is an acid, reacts with the calcium carbonate of the eggshell. The change makes the shell go soft and then disappear.
This is called, ‘decalcification.’