what is hard water | adichemistry

 Hard water contains dissolved salts of calcium and magnesium. It gives poor lather with soap and hence is not intended to be used in laundries and in water boilers used in industries. It forms scales (also called lime scales) on the walls of the boilers and hence to be softened before its usage in industries.

The Ca2+ and Mg2+ ions in hard water precipitate soap. Soap is the sodium salt of fatty acid. It is soluble in water. But when it comes in contact with hard water, an insoluble precipitate of calcium or magnesium salt of fatty acid is formed. Hence lather is not formed.

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what is hard water | adichemistry

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