You can also use a plastic cup or container to hold the egg, but clear containers allow you to observe the experiment over time. Use a fresh egg because an older egg will float in the liquid. Before you begin, examine your uncooked egg for cracks.
The chemical reaction between the acetic acid in the cola and the calcium carbonate in the eggshell causes the shell to dissolve.
Gently pour out the vinegar taking care to keep the egg from falling out of the container. Carefully roll the egg back down to the bottom of the container and refill it with vinegar.
Gently pour out the vinegar and catch the naked egg in your hand. See how it feels.
At a certain height, the egg will break. Do this activity outside or lay down newspaper before experimenting.
Add food coloring to the cup of water to color your egg. You can also shrink the egg after growing it, if desired.
You can put the egg back into a glass of water to grow it again after shrinking it, if desired.
