What you need:
A raw egg, a wide glass vinegar
What to do:
1. Fill the glass with vinegar, a little less than the brim
2. Drop the egg into the glass.
3. Leave the egg in the glass for two to three days. Make sure it’s away from sunlight. Keep observing what’s happening in the glass
4. On the third day, bring the egg out and rinse it thoroughly but gently under tap. Make sure that there is nothing left on the surface of the egg. the 5. On a plain surface, drop the egg from a gentle height of say four inches.
What happens?
While the egg is in the glass bubbles start appearing. The egg also becomes fatter and more translucent.
Once the egg is removed, we find that it has become spongy. So, when you drop it on a surface, it bounces.
Why?
Vinegar is an acid which dissolves the shell of the egg. The shell is made of calcium carbonate, which on reacting with the acetic acid of the vinegar gives out carbon dioxide. Since carbon dioxide is a bubbly gas, you see bubbles in the glass.
And since the acid has dissolved the shell completely, what’s left behind is the soft white inner membrane of the egg. This membrane is porous, so some of the vinegar has been absorbed into the egg, making it fatter. The stretchy nature of the membrane gives that bounce to the egg. But make sure you don’t bounce the egg too high unless you’re ready to clean the mess!
Picture Credit : Google
