Question

The temporary hardness of water can be removed by Clark's Method using _____.

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

Temporary hardness is due to the presence of bicarbonates of Calcium and Magnesium. Both these, when treated with $Ca(OH{)}_2$, precipitate $C{a}^{2+}$ and $M{g}^{2+}$ as insoluble carbonates, which can then be filtered out. This is called Clark's method.