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Calcium ortho-phosphate appears as loose sludge and thus can be removed by blow-down operation.

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Calcium ortho-phosphate appears as loose sludge and thus can be removed by blow-down operation.

(a) True

(b) False

The question was asked during a job interview.

This is a very interesting question from Calgon Conditioning topic in chapter Water and its Treatment of Engineering Chemistry II

1 Answer

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Correct option is (a) True

To explain I would say: Calcium orthophosphate appears as loose sludge and thus can be removed by blow-down operation. It is formed by the reaction of sodium ortho-phosphate with calcium salts.

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