Exploring Osmosis with the help of eggs

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Eggsperiment

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https://www.compoundchem.com/2016/03/26/eggs/

Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal.

An eggshell is made primarily from calcium carbonate, the chemical compound which also makes up the majority of sea shells, as well as chalk and limestone. 
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The shell isn’t completely solid – it has thousands of tiny pores, around 9,000 on average, which allow gases to pass in and out.
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Periodic Table of Elements

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https://www.quora.com/Why-is-calcium-a-metal
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https://www.britannica.com/science/calcium

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Eggshell nanostructure

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Chemistry of eggshell and vinegar

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​The egg shell is composed of calcium carbonate (CaCO3).

When calcium carbonate comes in contact with vinegar which contains acetic acid (CH3CO2H) a chemical reaction occurs.

2 CH3COOH + CaCO3 = H2CO3 + Ca(CH3COO)2

The carbonic acid breaks down to form carbon dioxide and water,

H2CO3 = H2O + CO2

​The shell is made up mostly of calcium carbonate.-- it contains calcium carbonate (94%), magnesium carbonate (1%), calcium phosphate (1%), and 4% organic matter-- vinegar which contains acetic acid will dissolve the shell.

https://www.scienceofcooking.com/eggs/naked-egg-experiment.html

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Salt Crystals 

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We are conducting a class Eggsperiment

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