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प्रश्न
What is permanent hardness of water? How can it be removed?
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उत्तर
The hardness due to the presence of chloride and sulphate salts of calcium and magnesium is known as the permanent hardness of the water.
Removal of hardness:
- Adding washing soda.
- Washing soda is used to remove the permanent hardness of the water.
- It converts chlorides and sulphates into insoluble carbonates.
- These insoluble carbonates are removed by filtration.
- Distillation
- Temporary and permanent hardness both can be removed by the method of distillation.
- The water obtained after distillation is called distilled water.
- It is the purest form of water.
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संबंधित प्रश्न
Temporary hardness of water can be removed by
What are the advantages of soft water.
Explain with equation, what is noticed when permanent hard water is treated with Washing soda.
Give balanced equation to show how temporary hardness enters into water.
Give reason for the following:
Washing soda can be used to remove both temporary and permanent hardness in water.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you distinguish between hard and soft water?
State the causes of hardness in water.
A sample of water is given in a trough. State how would you prove experimentally whether the given sample is hard water or soft water.
Temporary hardness of water can be removed by ________ of water.
Name the process by which temporary hardness is easily removed from the water.
