. what is a soap? Why are soaps not suitable for washing clothes when the water is hard


Best Answer

Ans. Soaps are sodium salts of fatty acids. Fatty acids are a type of carboxylic acids with long chain of carbon atoms.

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

-The formation of lather is necessary for removing dirt from clothes during the washing of clothes. Soap does not give lather with hard water as it reacts with the calcium and magnesium ions present in hard water to form insoluble precipitates of calcium and magnesium salts of fatty acids.

-The scum (or precipitate) formed by the action of hard water on soap sticks to the clothes being washed and it interferes with the cleaning ability of soap. This makes the cleaning of clothes difficult

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