Question

Temporary hardness of water can be removed by

Options

• Addition of potassium permagenate

• Boiling

• Filtration

• Addition of chlorine

Answer 1

Boiling

Explanation:

Water's transient hardness can be eliminated by boiling

\[\ce{Ca(HCO3)2 ->[Boil] \underset{(insoluble)}{CaCO3} + H2O + CO2}\]