Question

What is meant by water of crystallisation in a substance? How would you show that blue copper sulphate crustals contain water of crystallisation?

Answer 1

 Water of crystallization is the fixed number of water molecules present in one formula unit of a salt.

When we heat copper sulphate in china dish, the blue coloured crystals changes into a white powder due to the removal of 5 molecules of water of crystallization.

$CuSO _{4} . 5H_{2}O=CuSO_{4}+5H_{2}O$

Answer 2

Answer:

Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt.

When we heat copper sulphate in china dish the blue coloured crystals change into a white powder due to the removal of 5 molecules of water of crystallisation.

Explanation:

Cuso4. 5H2O = Cuso4 + 5H2O