Naked Eggs

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Naked Eggs

Spring Chicken Eggs (naked egg experiment)

I was thinking of Spring chickens the other day. That made me think of eggs and that gave me the idea for this week’s experiment!

This week, we are going to dissolve the shell off an egg and take a look inside.

Equipment

1-2 Eggs (we cracked our first egg so it might be good to have a back-up)

White vinegar

Jar or glass

Method

Place the egg into the glass or jar.

Cover it with vinegar.

Place the jar in the fridge overnight.

Take the egg out of the jar in the morning and rise gently in water. If there is still shell on the outside repeat the steps above.

On the second day rinse the egg again. The shell should be fully dissolved that the egg should have a thin bouncy outer layer that contains the yolk and white. 

Naked egg image from www.explorabox.org

image: www.explorabox.org

The Science

Egg shells are made from calcium carbonate. When the shell comes into contact with the acidic vinegar, a chemical reaction takes place. If you look carefully at the egg shell after you pour the vinegar over it you will see tiny bubbles that have formed. These are carbon dioxide bubbles that have occurred as part of the chemical reaction.

The shell “dissolves” when the reaction occurs as it changes from calcium carbonate (and vinegar) into water, carbon dioxide and calcium acetate.

For more exciting experiments why not grab our Chemistry-in-Action kit?


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