Question

Define water of crystallization Give the chemical formula for two
compounds as example. How can it be proved that the water of
crystallization make a difference in the state and colour of the
compounds​

Answer 1

the loosely held molecules of water are known as water of crystallization.

They are represented by dot (.)

eg - blue vitrol

CuSO4.5H2O→→CuSO4 + 5H2O.

Answer 2

Water molecules forming an essential part of crystal structure of some compounds is water of crystallization.