Question

What is water of crystallisation? ​

Answer 1

Explanation:

In chemistry, water(s) of crystallization or water(s) of hydration are water molecules that are present inside crystals. ... Classically, "water of crystallization" refers to water that is found in the crystalline framework of a metal complex or a salt, which is not directly bonded to the metal cation.

Answer 2

Answer:

WATER OF CRYSTALLIZATION –

The water molecules which form a part of the structure of this salt is called the water of crystallization.

Some examples for water of crystallization :

➸ CuSO4•5H2O [Copper sulphate pentahydrate]

➸ Na2CO3•10H2O [Sodium carbonate deca hydrate]

➸ CaSO4•2H2O [Calcium sulphate dihydrate]

➸ FeSO4•7H2O [Iron sulphate hepta hydrate]

➸ CaSO4•½H2O [Calcium sulphate hemihydrate]

• The salts which contain water of crystallization are called hydrous salts.
• When hydrated salts are heated strongly, they lose the water of crystallization. Such salts are called anhydrous salts.

Example –

➸ CuSO4•5H2O —(∆)—> CuSO4 + 5H2O

The blue coloured hydrous salt converts into white coloured.

This is reversible process.

➸ CuSO4 + 5H2O —> CuSO4•5H2O