Question

# Name a crystalline salt which does not contain water of crystallisation.

The chemical formula of potassium chloride is $K-Cl$
A well-known example of salts that have the water of crystallization is blue vitriol or hydrated copper sulphate with the formula $CuS{{O}_{4}}\cdot 5{{H}_{2}}O$ When we heat this crystalline salt, the water in it evaporates and it becomes amorphous and white in colour. This shows us that the water of hydration contributes to the structure and colour of the salt.