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Calcium ion concentration

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Fluoridation of treated water in a water collection and treatment station leaves the water with a fluoride ion concentration close to 5.0.10-5 mol / L. If the hot water in the station becomes hard (between Ca2 + or Mg2 +) for a few days, calcium fluoride may precipitate during the fluoridation process. In order for calcium flow not to occur, the calcium ion concentration must be below: (Given: Kps of calcium flow = 1.7.10-10)

Reference no: EM132542971

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