Question

Answer the questions below, relating your answers only to salts in the following list

Sodium chloride, anhydrous Calcium chloride, Copper sulphate -$5$- water

(a) What is the name given to the water in the compound Copper sulphate-5-water?

Answer 1

Definition of water crystallization

• The number of water$\left({\mathrm{H}}_2\mathrm{O}\right)$ molecules present in the salt crystal is called water crystallization.
• Since $5$ water$\left({\mathrm{H}}_2\mathrm{O}\right)$ molecules are present in the Copper sulphate -$5$- water, so according to definition water of crystallization is $5$.

Chemical formula for Copper sulphate -$5$- water

• ${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}$

Hence, the name of water $\left({\mathrm{H}}_2\mathrm{O}\right)$ molecules present in Copper sulphate -$5$- water $\left({\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}\right)$ is Water of crystallization.