Seawater contains many salts dissolved in it. Common salt 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 and is mined like coal. The common salt is an important raw material for chemicals of daily use.
A few crystals of ferrous sulphate were taken in a dry boiling tube and heated. Tiny water droplets were observed in the tube after some time.
Write the common name and the chemical name of the compound CaSO₄ · ½H₂O. Write the method of its preparation. Give chemical equation for the reaction, when water reacts with CaSO₄ · ½H₂O.
Salts play a very important role in our daily life. Sodium chloride which is known as common salt is used almost in every kitchen. Baking soda is also a salt used in faster cooking as well as in baking industry. The family of salts is classified on the basis of cations and anions present in them.
What will happen if a solution of sodium hydrocarbonate is heated? Give the equation of the reaction involved.
Write an equation to show the reaction between Plaster of Paris and water.
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