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9.22 What causes the temporary and permanent hardness of water ?
Answers (1)
Answer- Temporary hardness of water is because of the presence of salts of magnesium and calcium hydrogen carbonates. [ M = Mg,Ca]. Permanent hardness is due to the presence of soluble salts of magnesium and calcium in the form of chlorids and sulphates in water. e.g,
[M = Mg and Ca]
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