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Common salt

02 Acid, bases and salt

  • Common salt is also known as just ‘salt’.
  • The chemical name of common salt is sodium chloride (NaCl).
  • It is formed by the chemical reaction between hydrochloric acid and sodium hydroxide.
common salt


  • Evaporation of sea-water results in the formation of common salt. Rock salt is mined from the underground deposits just like coal.


  • It is used as a raw material for making a large number of useful chemicals in industry such as: sodium hydroxide (caustic soda), sodium carbonate (washing soda), sodium hydrogencarbonate (baking soda), hydrochloric acid, hydrogen, chlorine, and sodium metal.
  • It is used in cooking food. It improves the flavor of food.
  • It is required by our body for the working of nervous system, the movement of muscles, and the production of hydrochloric acid in the stomach for the digestion of food.
  • It is used as a preservative in pickles, and in curing meat and fish for the preservation of meat and fish).
  • It is used in the manufacture of soap.
  • It is used to melt ice which collects on the roads during winter in cold countries

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