Define water of crystallization.

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Solution

The water of crystallization: The water of crystallization is the number of water molecules that are present in one formula unit of salt. They give the crystals their shape.
Examples of water of crystallization :
Example 1: $Copper Sulphate ({CuSO}_{4} . 5 H_{2} O)$ .It is used as an antiseptic and as an antifungal agent for topical use.
Example 2: $Calcium Sulphate ({CaSO}_{4} . 2 H_{2} O)$ . It is used in the manufacture of plastic of Paris.

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