Which of the following methods can be used to remove temporary hardness from water?

Explanation

Boiling removes temporary hardness. Heat breaks down calcium bicarbonate into insoluble calcium carbonate. This precipitate settles out of water.

Filtration removes particles. Chlorination kills germs. Distillation removes all dissolved minerals but is expensive.

Remember: Temporary hardness comes from bicarbonates. Permanent hardness needs other treatments.