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At high temperature and pressure, calgon is converted into sodium ortho-phosphate which reacts with ____________ salts.

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in Engineering Chemistry II by (789k points)
At high temperature and pressure, calgon is converted into sodium ortho-phosphate which reacts with ____________ salts.

(a) Magnesium

(b) Calcium

(c) Sodium

(d) Potassium

The question was posed to me in unit test.

My query is from Calgon Conditioning in chapter Water and its Treatment of Engineering Chemistry II

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The correct answer is (b) Calcium

To elaborate: At high temperature and pressure, calgon is converted into sodium orthophosphate which reacts with calcium salts to form calcium ortho-phosphate.

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