Question

Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you remove temporary hardness and permanent hardness from water using a chemical compound?

Answer 1

To remove temporary hardness and permanent hardness using a chemical compound. Chemical compound used is washing soda which removes both kind of hardness.

Experiment
Temporary and permanent hard water softened by addition of washing soda

1. Temporary and permanent hard water are taken separately in beakers and washing soda is added to each sample of water. The above solutions are filtered – to remove the precipitate formed.
2. Ordinary soap is rubbed – inside the filtered solution.

Observation

1. The filtered sample of temporary and permanent hard water lathers – readily with ordinary soap.

Result

1. Temporary hard water and Permanent hard water can be – softened by using washing soda.