Question

(4) What causes the hardness of water? (Textbook pag Ans.ब​

Answer 1

Answer:

Hardness in water is caused by dissolved calcium and, to a lesser extent, magnesium. It is usually expressed as the equivalent quantity of calcium carbonate. Depending on pH and alkalinity, hardness above about 200 mg/l can result in scale deposition, particularly on heating.

Answer 2

Answer:

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Explanation:

Hardness in water is caused by dissolved calcium and, to a lesser extent, magnesium. It is usually expressed as the equivalent quantity of calcium carbonate. Depending on pH and alkalinity, hardness above about 200 mg/l can result in scale deposition, particularly on heating.Hardness of water is due to the presence of calcium and magnesium salts. These ions form insoluble calcium and magnesium soaps when sodium or potassium soaps are dissol

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