Question

Why are some salts called hydrated salts?

Answer 1

1. Hydrated salts are the salts that are loosely attached to a certain number of water molecules.
2. The water of crystallization is when the water is found in the crystalline framework of a salt or metal complex, which is not directly bonded to the metal cation.
3. Some salts are called hydrated salts because they contain water of crystallization.

For example;

Washing soda $({\mathrm{Na}}_2{\mathrm{CO}}_3·10{\mathrm{H}}_2\mathrm{O})$, Calcium Chloride hexahydrated $({\mathrm{CaCl}}_2·6{\mathrm{H}}_2\mathrm{O})$ , etc.