Fill in the following blanks:
(a) Common salt is obtained from sea-water by the process of.............
(b) Rock salt is mined just like ......................
(c) Chemical formula of washing soda is ..................
(d) Sodium hydrogen carbonate is .................. soda whereas sodium carbonate is ................. soda.
(e) The chemical formula of plaster of Paris is ............

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Solution

(a) Common salt is obtained from sea-water by the process of evaporation.
(b) Rock salt is mined just like coal.
(c) Chemical formula of washing soda is Na₂CO₃.10H₂O.
(d) Sodium hydrogen carbonate is baking soda whereas sodium carbonate is washing soda.
(e) The chemical formula of plaster of Paris is CaSO₄.1/2H₂O.

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Similar questions

Q. Chemical name and formula of washing soda is hydrated sodium carbonate and

N a_{2} C O_{3} .10 H_{2} O

respectively.

Q. Match the following columns.

Column (I)	Column (II)
(1) Bleaching powder	(a) Sodium bicarbonate
(2) Baking soda	(b) Sodium carbonate
(3) Washing soda	(c) Calcium oxychloride
(4) Plaster of Paris	(d) Calcium sulphate hemihydrate

(a) Describe how washing soda is produced starting from sodium chloride (common salt). Write equations of all the reactions involved.

(b) State whether an aqueous solution of washing soda is acidic or alkaline ? Give reason for your answer.

(d) Give two important uses of washing soda (or sodium carbonate).

Q. Fill in the blanks: The chemical formula of washing soda.......

Washing soda has the formula $N a_{2} C O_{3} . 10 H_{2} O .$ What mass of anhydrous sodium carbonate is left when all the water of crystallization is expelled by heating 57.2 g of washing soda?

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