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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
What is the effect on boiling point of water when impurity is added.
Give two examples of hydrated substances.
Define the Soft water.
Name the compound responsible for temporary hardness.
State the disadvantages of using hard water.
Differentiate between Hard & soft water with suitable examples.
Give balanced equation to show how temporary hardness enters into water.
Give two natural sources of hard water.
What are the methods of removing hardness of water?
What is permanent hardness of water? How can it be removed?
