Question

what is mean by hard water

Answer 1

the water which does not form lather with soap

Answer 2

$\huge\underline\blue{Answer:-}$

Hard water is water that has high mineral content (as opposed to "soft water"). Hard water is used to describe any water that contains mineral ions with a charge of +2. It is formed when water percolates through deposits of calcium and magnesium-containing minerals such as limestone, chalk and dolomite.

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