Temporary hardness in water is due to which one of the following of calcium and magnesium ........

General Science (NDA) Chemistry

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Temporary hardness in water is due to which one of the following of calcium and magnesium?

Hydrogencarbonates

Carbonates

Chlorides

Sulphates

Explanation:

Hard water contains dissolved magnesium and calcium ions. These make it more difficult for the water to form a lather with soap. Temporary hardness is caused by dissolved calcium hydrogcncarbonate (which is removed by boiling). Permanent hardness is caused by dissolved calcium sulfate (which is not removed by boiling).