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CBSE - X - Chemistry - Acids, Bases and Salts


Asked by 30th July 2012, 6:29 AM
Answered by Expert


Permanent hardness is hardness (mineral content) that cannot be removed by boiling. When this is the case, it is usually caused by the presence of calcium and magnesium sulphates and/or chlorides in the water, which become more soluble as the temperature rises. Despite the name, the hardness of the water can be easily removed using a water softener, or ion exchange column.

Answered by Expert 31st July 2012, 5:39 PM

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