Question

A substance that contains water of crystallization is called a ________________________ substance.

Answer 1

• During the process of crystalization, the solution is heated and more of the solute molecules are added to the solution till it becomes saturated.
• Then it is allowed to cool in order to obtain the pure crystals of substance.
• In water crystalization, there is a definite number of water molecules chemically bonded to the salt in its crystalline form.
• These water molecules are responsible for the shape and color of the crystals.
• A substance that contains water of crystallization is called a hydrated substance.
• Example : Blue crystals of $\mathrm{Copper}\mathrm{sulphate}({\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O})$ is a hydrated substance and this compound is formed by the chemical combination of ${\mathrm{CuSO}}_4$ with 5 molecules of water(${\mathrm{H}}_2\mathrm{O}$).

Thus, A substance that contains water of crystallization is called a hydrated substance.