What happens when a egg is placed into vinegar overnight?

Placing an egg in vinegar overnight is a classic science experiment that demonstrates the dissolving power of acids. Here's what happens:

The Chemistry:

* Vinegar is an acid (acetic acid). The acid reacts with the calcium carbonate that makes up the egg shell.

* Calcium carbonate dissolves in the acid. This creates carbon dioxide gas (the bubbles you see), water, and calcium acetate.

* The eggshell thins and becomes rubbery. The calcium carbonate is the hard part of the eggshell, so as it dissolves, the shell weakens.

The Results:

* The eggshell disappears. You'll be left with a bouncy, rubbery egg.

* The egg swells. The vinegar seeps into the egg, causing it to expand slightly.

* The egg becomes translucent. You can even see the yolk through the thinned membrane!

Why it's Cool:

This experiment is a fun way to teach kids about chemical reactions and the properties of acids. It also shows the importance of calcium in building strong bones.

Important Note: The egg will be fragile and likely to burst. It's best to handle it gently.