A water sample was tested for hardness. To titrate Ca2* and Mg2+, a 25.00-mL sample needed 7.39 ml of 0.00964 M EDTA. Another 25.00-mL aliquot was mixed with sufficient NaOH to precipitate out Mg2* as Mg(OH)216). Titration of the clear supernatant liquid required 4.54 mL of the same standard EDTA solution. FW: CaCO3 = 100.09, Mg = 84.31, Ca = 40.078 %3D (Report answers in 3 SF.) a. Calculate the concentration of CaCO3 (FW=100.09) in the sample in ppm. ppm a. Calculate the concentration of MgCO3 (FW=84.31) in the sample in ppm. ppm

A water sample was tested for hardness. To titrate Ca2* and Mg2+, a 25.00-mL sample needed 7.39 ml of 0.00964 M EDTA. Another 25.00-mL aliquot was mixed with sufficient NaOH to precipitate out Mg2* as Mg(OH)216). Titration of the clear supernatant liquid required 4.54 mL of the same standard EDTA solution. FW: CaCO3 = 100.09, Mg = 84.31, Ca = 40.078 %3D (Report answers in 3 SF.) a. Calculate the concentration of CaCO3 (FW=100.09) in the sample in ppm. ppm a. Calculate the concentration of MgCO3 (FW=84.31) in the sample in ppm. ppm

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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Question

A water sample was tested for hardness. To titrate Ca2* and Mg2+, a 25.00-mL sample
needed 7.39 mL of 0.00964 M EDTA. Another 25.00-mL aliquot was mixed with
sufficient NaOH to precipitate out Mg2* as Mg(OH)215). Titration of the clear
supernatant liquid required 4.54 mL of the same standard EDTA solution.
FW: CaCO3 = 100.09, Mg = 84.31, Ca = 40.078
(Report answers in 3 SF.)
a. Calculate the concentration of CaCO3 (FW=100.09) in the sample in ppm.
ppm
a. Calculate the concentration of MgCO3 (FW=84.31) in the sample in ppm.
ppm

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