Question

Write any five uses of salts.

Answer 1

Common Salt (NaCl):

It is used in our daily food and used as a preservative. 

1. Washing Soda (Sodium Carbonate): 

• It is used in softening hard water. 
• It is used in glass, soap and paper industries. 

2. Baking Soda (Sodium bicarbonate -NaHCO₃): 

• It is used in making of baking powder which is a mixture of baking soda and tartaric acid. 
• It is used in soda-acid fire extinguishers. Baking powder is used to make cakes and bread, soft and spongy. 
• It neutralizes excess acid in the stomach and provides relief.

3. Bleaching powder (Calcium Oxychloride – CaOCl₂)

• It is used as disinfectant. 
• It is used in textile industry for bleaching cotton and linen.

4. Plaster of Paris (Calcium Sulphate Hemihydrate – CaSO₄ . \(\frac{1}{2}\)H₂O)

• It is used for plastering bones. 
• It is used for making casts for statues.