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Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions.

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Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions.

(a) True

(b) False

This question was posed to me during an internship interview.

This intriguing question originated from Hardness of Water topic in section Water and its Treatment of Engineering Chemistry II

1 Answer

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Correct choice is (a) True

To explain: Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions. This is also called carbonate hardness. It is temporary and can be removed easily by boiling.

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