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प्रश्न
Explain with equation, what is noticed when permanent hard water is treated with Washing soda.
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उत्तर
When washing soda or soda ash is added to hard water, the corresponding insoluble carbonates settle down and can be removed by filtration.
\[\ce{Ca(HCO3)2 + Na2CO3 ->[boil] CaCO3 \downarrow + 2NaHCO3}\]
\[\ce{Mg(HCO3)2 + Na2CO3 ->[boil] MgCO3 \downarrow + 2NaHCO3}\]
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संबंधित प्रश्न
Give two examples of hydrated substances.
Suggest one method for the removal along with the reaction for temporary hardness.
Suggest one method for the removal along with the reaction for permanent hardness of water.
What do you understand by
Hard water
Give balanced equation to show how temporary hardness enters into water.
Give balanced equation to show how temporary hardness in water can be removed by boiling.
Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.
Explain the meaning of the terms – hard water & soft 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.
Name the process by which temporary hardness is easily removed from the water.
