Chemicals from Common Salt

The salt formed by the combination of hydrochloric acid and sodium hydroxide solution is called sodium chloride.

Fig – Chemicals from Common Salt

This is the salt that you use in food. It is a neutral salt. Seawater contains many salts dissolved in it. Sodium chloride is separated from these salts. Deposits of solid salt are also found in several parts of the world. These large crystals are often brown due to impurities. This is called rock salt. Beds of rock salt were formed when seas of bygone ages dried up. Rock salt is mined like coal.
You must have heard about Mahatma Gandhi’s Dandi March. sodium chloride was such an important symbol in our struggle for freedom.

Fig – Mahatma Gandhi’s Dandi March

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