Q29 of 270 Page 96

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..............

(a) evaporation

(b) coal


(c) Na2CO3 .10H2O


(d) baking; washing


(e) CaSO4H2O.


More from this chapter

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27

The electrolysis of an aqueous solution of sodium chloride gives us three products. Name them.

 28

During the electrolysis of a saturated solution of sodium chloride, where is:

(a) chlorine formed?


(b) hydrogen formed?


(c) sodium hydroxide formed?

 30

Complete and balance the following chemical equations:

 31

What is washing soda? State two properties and two uses of washing soda.