Question

The hard water of a well becomes soft on adding washing soda to it. Give scientific reason

Answer 1

Explanation:

The hardness of hard water is due to the presence of chlorides and sulphates of calcium and magnesium. When washing soda (Na2CO3. 10H2O) is added to the hard water, Na2CO3 reacts with the chlorides and sulphates of calcium and magnesium and converts them to insoluble carbonate salts.

Answer 2

the answer is in the attachment

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