Question

Why soap forms a precipitate in hard water

Answer 1

Soap is sodium and potassium salts of long chain carboxylic acids which reacts with the calcium and magnesium salts of the hard water to form an insoluble curdy precipitate.

Answer 2

Hey Mate!!!

Here's your answer:

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Soap is sodium and potassium salts of long chain carboxylic acids which reacts with the calcium and magnesium salts of the hard water to form an insoluble precipitate known as sccum.

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Hope it did a little bit help to you ♡