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Meenu Lal from Govt., asked a question
Subject: Chemistry , asked on 8/3/11

wat are the methods to remove the temporary hardness of water?????????????

Meenu Lal From Govt., added an answer, on 8/3/11
13 helpful votes in Chemistry

Thank you vivek

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Sajan Coolz , added an answer, on 8/3/11
10 helpful votes in Chemistry

  Temporary hardness can be removed by boiling the water and then filtering it. The Calcium and magnesium bicarbonates present in temporarily hard water form insoluble precipitates on boiling the water. The Carbon dioxide present in bicarbonates is also removed during boiling. Ca(HCO3)2 → CaCO3↓ + CO2 + H2O. In this reaction, CaCO3 is the insoluble precipitate which can be filtered out. CO2 gas is evolved, and soft H2O is left behind.

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