Question

What causes the hardness of wate r?

Answer 1

$\huge\sf\underline{Answer}:$

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:

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.