2.4.3 Cheniicals from Common Salt
By now you have learnt that the salt formed by the combination of hydrochloric acid and sodium hydroxide solution is called sodium chloride. This is the
salt that you use in food. You must have observed in the above Activity that it is a neutral salt.
Seawater contains many salts dissolved in it. Sodium chloride is separatedfrom thes salts. Deposits of solid salt are also found several parts of the
world. These large crystals are often brown due to impurities. This ié called rock salt. Beds ofrock salt were formed when seas of bygone ages dried up.
Rock salt is mined like coale