State reasons for the following occurrences: (i) Soaps do not do the cleansing in hard water.(ii) Synthetic detergents are preferred to soaps in washing machines.

State reasons for the following occurrences: (i) Soaps do not do the c

1.	State reasons for the following occurrences: (i) Soaps do not do the cleansing in hard water.(ii) Synthetic detergents are preferred to soaps in washing machines.
Answer» (i) This is because the Ca²⁺ and Mg²⁺ions present in hard water get precipitated as calcium and magnesium soap which being insoluble stick to the clothes as gummy mass. (ii) This is because detergents can be used in hard water as well as in acidic solutions, as sulphuric acid and their calcium and magnesium salts are soluble in water but the fatty acids and their calcium and magnesium salts are insoluble.

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State reasons for the following occurrences: (i) Soaps do not do the cleansing in hard water.(ii) Synthetic detergents are preferred to soaps in washing machines.

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