Uses of salts

Uses of Salts

          Salts are used in the fields like a) domestic b) agriculture c) medicine d) photography and e) industries
a) Domestic uses
1. Sodium chloride is used in food preparation and used as a preservative in making pickles, preserving fish, meats, vegetables, etc.
2. Baking soda is used as a self raising flour to raise the breads and cakes.
3. Washing soda is used to wash cloths.
4. Bleaching powder is used in bleaching cloths and cleaning water.
5. Calcium carbonate is used to prepare chalk piece.
6. Potash alum helps in rapid settling of suspended impurities in water. It is used for the purification of water. 
7. Sodium benzonate is used as a food preservative.
8. Silver nitrate is used in hair dyes.
b) Agricultural uses
1. Bordeaux mixture ( mixture of copper sulphate + lime ) is used as an insecticide.
2. Ammonium chloride, ammonium sulphate and superphosphate of lime are used as fertilizers.
3. NPK ( Nitrogen-Phosphours-Potassium) fertilizers contain ammonium nitrate, ammonium sulphate, ammonium phosphate and potassium chloride. These salts provide a source of nitrogen, phosphorus and potassium to the soil.
4. Salts like copper sulphate is used as a fungicide.
5. Nitre ( Potassium Nitrate) is also used as a fertilizer.
c) Medicinal uses
1. Plaster of paris is used as surgical bandage to set fractured bones.
2. Epsom salt is used as a laxative by patients suffering from constipation.
3. Smelling soda is also used for preparing antacid tablets for controlling acidity of stomach.
d) Photography
1. Silver nitrate, silver bromide and sodium thiosulphate (hypo) salts are used in photography.
e) Industrial uses 
1. Potassium nitrate is used in fire works.
2. Sodium nitrate is used in gunpowder and fireworks.
3. Potash alum is used for tanning of leather, sizing paper and as a mordant.
4. Potassium chlorate is used in match industry
5. Copper sulphate is used in dyeing and printing industry. It is also used in electro plating of copper metal.

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