A sample of mineral water containing Ca and Mg was analyzed by a complexation titration using EDTA as the titrant. A 50 ml aliquot of the sample was rendered strongly alkaline to precipitate the Mg as Mg(OH)2. Titration with a calcium specific indicator required 20 ml of 0.02M EDTA. A second 50 ml aliquot was adjusted to pH 10 titrating with 0.02M EDTA required 32.50 ml of 0.02M EDTA. Calculate the ppm CaCO3 (MW=100g/mol) and ppm MaCO3 (MW=84 g/mol) in the mineral water.

A sample of mineral water containing Ca and Mg was analyzed by a complexation titration using EDTA as the titrant. A 50 ml aliquot of the sample was rendered strongly alkaline to precipitate the Mg as Mg(OH)2. Titration with a calcium specific indicator required 20 ml of 0.02M EDTA. A second 50 ml aliquot was adjusted to pH 10 titrating with 0.02M EDTA required 32.50 ml of 0.02M EDTA. Calculate the ppm CaCO3 (MW=100g/mol) and ppm MaCO3 (MW=84 g/mol) in the mineral water.

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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2. A sample of mineral water containing Ca and Mg was analyzed by a complexation titration
using EDTA as the titrant. A 50 ml aliquot of the sample was rendered strongly alkaline
to precipitate the Mg as Mg(OH)2. Titration with a calcium specific indicator required 20
ml of 0.02M EDTA. A second 50 ml aliquot was adjusted to pH 10 titrating with 0.02M
EDTA required 32.50 ml of 0.02M EDTA. Calculate the ppm CaCO3 (MW=100g/mol) and
ppm M9CO3 (MW=84 g/mol) in the mineral water.

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