Which of the following groups of ions makes the water hard ?

Question

Which of the following groups of ions makes the water hard ? (A) Sodium and bicarbonate (B) Magnesium and chloride (C) Potassium and sulphate (D) Ammonium and chloride

Tardigrade Admin · Accepted Answer

Temporary hardness is due to presence of bicarbonates of calcium and magnesium and permanent hardness is due to the sulphates or chlorides of both of calcium and magnesium.

Q. Which of the following groups of ions makes the water hard ?

Sodium and bicarbonate

Magnesium and chloride

Potassium and sulphate

Ammonium and chloride

Temporary hardness is due to presence of bicarbonates of calcium and magnesium and permanent hardness is due to the sulphates or chlorides of both of calcium and magnesium.