Question

what is washing soda? State two properties and two uses of washing soda?

Answer 1

Sodium Carbonate (aka Washing Soda or Soda Ash) is a highly alkaline substance that's unique chemical composition makes it excellent for household uses like degreasing, brightening and cleaning tough messes.

Two properties of washing soda :-

(a) Two important uses of washing soda

(i) It is used in the manufacture of soap and glass.

(ii) It is used to remove the permanent hardness of water.

(b) Two important uses of baking soda

(i) It is used for making baking powder.

(ii) It is used in soda- fire extinguishers.

Answer 2

Physical properties and chemical properties of sodium carbonate:

It is a crystalline solid which is white in color.

It exists as a monohydrated salt (Na2CO3.10H2O), anhydrous salt (Na2CO3) , heptahydrous salt (Na2CO3.7H20) and decahydrate salt (Na2CO3.10H2O).

Sodium carbonate is basic in nature.

It has a melting point of 851°C.

In the presence of heat, it loses its water to form an anhydrous salt (soda ash).

Na2CO3.10H2O →373k Na2CO3.H2O →373k Na2CO3

Benefits of sodium carbonate:

Used as a cleansing agent in industries and household.

It finds its application in paper, textile, soap, and detergent industries.

It is used in the process of softening of water.

It is used in the manufacturing of glass.

It is one of the most important agents in laundries.

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