Question

Mention two situations where you use hydrated and unhydrated salts in your daily life.

Answer 1

1. NaCl is unhydrated salt. It flows freely when filled in a container. 

2. NaHCl (Baking soda) is unhydrated salt. It flows freely when filled in a container.

3. NaCO₃ . 10H₂O (washing soda) is hydrated salt. It leaves wetness inside the container. 

4. CaSO₄ . 2H₂O (Gypsum) is also hydrated salt. On careful heating of gypsum it loses water molecules partially to become (CaSO₄ . 1/2H₂O) P.O.P. It is used in hospitals as plaster for supporting fractured bones in right position.