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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.
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.
A milkman adds a very small amount of baking soda to fresh milk.
Give two important uses of washing soda and baking soda.
How would you distinguish between baking powder and washing soda by heating?
A student found a white crystalline powder at home, commonly used for cooking. He tested its pH and found it to be slightly basic. When he heated it releases a gas that turned lime water milky.
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