Question

A compound containing half molecule of water of crystallisation on mixing with water changes to hard solid mass having two molecule of water of identify the compounds and write the reaction​

Answer 1

Water of crystallization or the water of hydration is the water that occurs in the crystals. It is denoted as hydrated compound nH

2

O. For example, gypsum is a soft mass having the formula CaSO

4

.2H

2

O. On heating gypsum, plaster of paris is formed by losing the water of crystallization. Plaster of paris is a hard mass with the formula CaSO

4

.

2

1

H

2

O.