Chemistry
State the cause of hardness in temporary & permanent hard water.
Water
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Answer
Cause of temporary hardness — presence of calcium and magnesium bicarbonates - Ca(HCO3)2, Mg(HCO3)2
Cause of permanent hardness — presence of calcium and magnesium chlorides and sulphates in water — CaCl2, MgCl2, CaSO4, MgSO4
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