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 Form 4 Acids, Bases and Salts Topical Questions and Answers

(a) Explain why permanent hardness in water cannot be removed by boiling.
(b) Name two methods that can be used to remove permanent hardness from water.

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Answer Text:
a)- The calcium and magnesium compounds in the water cannot be decomposed by heating
b)- Ionic exchange
- Adding sodium carbonate (washing soda)


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