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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?
Solution
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
- 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.
- Ordinary soap is rubbed – inside the filtered solution.
Observation
- The filtered sample of temporary and permanent hard water lathers – readily with ordinary soap.
Result
- Temporary hard water and Permanent hard water can be – softened by using washing soda.
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