question

Asked by  | 30th Jul, 2012, 06:29: AM

Expert Answer:

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  | 31st Jul, 2012, 05:39: PM

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