Question

(a) Soap cannot be used in hard wat​

Answer 1

Answer:

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Answer 2

Answer:

Soaps are not suitable for washing clothes when water is hard:

Soaps, when used with hard water, does not lather or produce foam easily because of the formation of a curdy precipitate or scum.

This scum is created when soaps react with the calcium and magnesium ions present in hard water.

Explanation:

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