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The total concentration of Ca2 + and Mg2+ in a sample of hard water was determined by

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The total concentration of Ca2 + and Mg2+ in a sample of hard water was determined by titrating a 0.100-L sample of the water with a solution of EDTA4-.The EDTA4- chelates the two cations:

It requires 31.5 mL of 0.0104 M [EDTA]4- solution to reach the end point in the titration. A second 0.100-L sample was then treated with sulfate ion to precipitate Ca2+ as calcium sulfate. The Mg2+ was then titrated with 18.7 mL of 0.0104 M[DTA]4- .Calculate the concentrations of Mg2+ and C a2 in the hard water in .
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Calculate the concentration of Mg 2 alone and then the concentration of Ca 2 by di...View the full answer


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Chemistry The Central Science

Chemistry The Central Science

ISBN: 978-0321696724

12th edition

Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward

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