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Question
Give a scientific explanation.
Soap forms a precipitate in hard water.
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Solution
When soap is mixed with hard water calcium and magnesium salts of fatty acids are formed. These being water insoluble they form a precipitate and that is why lather is not formed.
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RELATED QUESTIONS
Hard water is not available for an experiment. Some salts are given below :
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(IV) Calcium sulphate
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