Bouncing egg that is in the shell
- in-shell egg,
Soak the egg in vinegar for about 24 hours in the refrigerator.
At the end of day, you can bounce an egg.
Eggshell contains salts - carbonates, which are responsible for the hardness of the shell. In the reaction with vinegar emits carbon dioxide (hence the bubbles in the glass after throwing egg in vinegar) carbonate from the shell in the reaction is converted into carbon dioxide and water - eggshell becomes soft.
In a similar manner using the reaction of carbonates and vinegar can create a rectangular egg:
Egg placed in a rectangular container of similar size to the eggs and the egg container with pour vinegar so that the whole egg was submerged. Load the container from the top. After about 12 hours to turn the egg in a container and let stand for about 4-5 hours. After removing the container has the shape of an egg.