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प्रश्न
Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.
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उत्तर
Removal of permanent hardness in water by adding washing soda : CaCl2 or CaSO4 present in permanent hard water exchanges the ions and forms CaCO3 which being in soluble can be filtered.
\[\ce{\underset{\text{Washing soda}}{Na2CO3} + \underset{\text{Present in hard work}}{CaSO4} -> CaCO3↓ + Na2SO4}\]
\[\ce{Na2CO3 + CaCl2 -> CaCO3↓ + 2NaCl}\]
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संबंधित प्रश्न
Define the Hard water.
Suggest one method for the removal along with the reaction for temporary hardness.
What do you understand by
Hard water
Explain the permutit method for softening hard 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?
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you prove the advantage of detergent over soap.
Explain the meaning of the terms – hard water & soft water.
State the causes of hardness in water.
Permanent hardness of water is due to the presence of _______.
Name the process by which temporary hardness is easily removed from the water.
