Question

What is meant by water crystallization? Give examples of salts with water of crystallization and their uses.

Answer 1

Crystallisation, is the process of atoms or molecules arranging into a well-defined, rigid space lattice so as to attenuate their energetic state. The littlest entity of the space lattice is named a unit , which may accept atoms or molecules to grow a macroscopic crystal.

Complete answer:
Water of crystallization is the amount of water molecules which are present in one formula unit of salt. We will also say that the water molecules which form a part of a structure of a crystal are called water of crystallization. They provide the crystals their shape and crystal.
Example: Copper(II) sulfate (Copper sulphate)- it's used as an antiseptic and as an antifungal for topical use.
Calcium sulphate- it's utilized in the manufacture of Plaster of Paris and also utilized in tofu as a coagulant.
Water of crystallisation or water of hydration or crystallisation water is the water that's found within the crystalline framework of a metal complex or salt, which isn't directly bonded to the metal cation.
It is defined because of the fixed number of water molecules that chemically combine with one formula unit of a salt. The water crystals are often removed by heating but the properties of the crystal could also be lost during this process. A salt that's related to water of crystallisation is understood as a hydrate.

Note:
The property of a substance to lose wholly or partly the water of crystallisation when the crystals are exposed to dry air even for a brief time. These substances are called efflorescent substances and through this process, the crystal loses its shape and turns into a powdery form.