What do you mean by water molecules of crystallization? Give examples.

Water molecules of crystallization:

i. Salts mainly exist in crystalline form.

ii. Sometimes they have some water molecules present as crystallization water molecules.

iii. When we write chemical formula of salt along with a number of water molecules present, is called crystallization water molecules.

For examples:

Washing soda – Na₂CO₃.10H₂0

Here 10 molecules of water are present as water molecules of crystallization.

Gypsum – CaSO₄.2H₂O

Here 2 molecules of water are present as water molecules of crystallization.