Question

Two formula units of calcium sulphate shares X molecules of water as water of crystallization in POP. X is

Answer 1

Answer:

1

Explanation:

Formula of POP = CaS$O_{4}$ .1/2 $H_{2}O$

For 1 formula unit, we require 1/2 molecules of water.

Therefore, for 2 formula units, we need 1 molecule of water

Answer 2

Molecules of water required is X. And X is :

Given : Two formula units of calcium sulphate shares X molecules of water as water of crystallization in POP ( Plaster of paris )

• We know that chemical formula of POP is

CaSO4. 1/2H2O

• 1 unit of calcium sulphate requires 1/2 molecules of water

• 2 units of calcium sulphate will require 1 molecule of water as water of crystallization.

• Hence X is 1