Q12 of 18 Page 90

What is meant by "water of crystallization" of a substance? Describe an activity to show the water of crystallization. (AS3)

The water of crystallization: The fixed number of water molecules present in one formula unit of a salt is called water of crystallization.

In the crystals of some compounds, water molecules are included in this arrangement. That is the water of crystallization.


Activity to show water of crystallization:


Step 1: Take some crystals of copper sulfate in a test tubes


Step 2: Add some water in one test tube and shake it.


On heating, the crystalline structure of copper sulphate broke down to form a colourless powder and water came out. This water was part of the crystal structure of copper sulphate. It is called water of crystallization.


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