How is common salt obtained from sea - water ?

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Solution

Sodium chloride is a white solid. It is obtained on a large scale by evaporation of sea water. The crude salt so obtained contains impurities such as sodium sulphate, calcium sulphate, calcium chloride and magnesium chloride. The crude salt is dissolved in water, the impurities are filtered off and the pure sodium chloride is precipitated out from the solution by passing chlorine gas.

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Similar questions

(a) Name the process by which common salt is obtained from sea-water.

(b) Name the process by which common salt is purified.

Where is the sea water trapped in order to obtain common salt from it?

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