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How to Make a Naked Egg

Experiments | 7-14 yrs | Animation, Video

Egg without Shell Experiment

Have you ever seen an egg naked, without its thick white outer coat? Is it possible to see an egg hold steady while its outer shell has just disappeared? I will demonstrate how to do it.

Take a clear glass and fill it with clear vinegar. Now place a raw egg inside it. The egg should immerse completely inside the vinegar. Cover it and leave it aside for 24 hours. You will see frothy bubbles appearing of top of the glass. Change the vinegar and keep it intact for 7 days. After 7 days, wash the egg gently and remove the white powdery substance. Now you are holding a translucent egg. When you flash a light at it, it will shine through the egg. The egg is now soft but will harden once it reacts with the carbon dioxide in the air.

The egg has expanded or swelled a bit, through the process of osmosis; where the membranes of the egg have allowed water to permeate in. The shell of the egg is composed of calcium carbonate (a base), which simply dissolves in the vinegar (acetic acid). The bubbles that you observed appearing were actually carbon dioxide that had formed in the chemical reaction. The calcium is the white substance that is let loose from the egg shell in the reaction.

You can add some coloring and make colored eggs also. Or you can just roll with the egg and play with it. Or if it breaks, the yellow liquid inside will mix with the vinegar; and you have an egg pickle!

For more such science experiments and articles for kids, visit http://mocomi.com/learn/science/

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