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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
What is the effect on boiling point of water when pressure is increased?
What is the effect on boiling point of water when impurity is added.
Name the compound responsible for permanent hardness of water.
Temporary hardness of water can be removed by
What are the advantages of hard water.
State the disadvantages of using hard water.
Give two natural sources of hard 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.
Permanent hardness of water is due to the presence of _______.
What is the reason for the hardness of water?
