Question

what is water of crystallization

Answer 1

The water molecules which form part of the structure of a crystal (or a salt) are called water of crystallisation.

Answer 2

Water of crystallisation is the number of water molecules that combine chemically in definite molecular proportion, with the concerned salt in the crystalline state. This water is responsible for the geometric shape and colour of the crystals.

For example: the CuSO4.5H2O