Titration of Ca2+ and Mg2+ in a 50.00-mL sample of hard water required 23.65 mL of 0.01205 M EDTA. A second 50.00-mL aliquot was made strongly basic with NaOH to precipitate Mg2+ as Mg(OH)2(s). The supernatant liquid was titrated with 14.53 mL of the EDTA.Calculate the concentration in ppm of CaCO3 in the sample.Calculate the concentration in ppm of MgCO3 in the sample.

Given that Ca2+ in a 50.00-mL sample of hard water required 23.65 mL of 0.01205 M EDTA

Answered: Titration of Ca2+ and Mg2+ in a…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Titration of Ca²⁺ and Mg²⁺ in a 50.00-mL sample of hard water required 23.65 mL of 0.01205 M EDTA. A second 50.00-mL aliquot was made strongly basic with NaOH to precipitate Mg²⁺ as Mg(OH)₂(s). The supernatant liquid was titrated with 14.53 mL of the EDTA.
1. Calculate the concentration in ppm of CaCO₃ in the sample.
2. Calculate the concentration in ppm of MgCO₃ in the sample.

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