A river water sample was titrated against 0.0250 M EDTA to test its hardness. of 0.0250 M EDTA. A 50.00-mL aliquot, prepared with NaOH, was titrated with 14.53 mL of the same EDTA titrant. Another 50.00 mL aliquot was prepared and buffered to pH 10.0, it required 23.55 mL Calculate the following: a. Total hardness (ppm CaCO3). b. Calcium hardness (ppm CaCO3). c. Magnesium hardness (ppm MgCO3).'

A river water sample was titrated against 0.0250 M EDTA to test its hardness. of 0.0250 M EDTA. A 50.00-mL aliquot, prepared with NaOH, was titrated with 14.53 mL of the same EDTA titrant. Another 50.00 mL aliquot was prepared and buffered to pH 10.0, it required 23.55 mL Calculate the following: a. Total hardness (ppm CaCO3). b. Calcium hardness (ppm CaCO3). c. Magnesium hardness (ppm MgCO3).'

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.29QAP

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Question

A river water sample was titrated against
0.0250 M EDTA to test its hardness. of
0.0250 M EDTA. A 50.00-mL aliquot,
prepared with NaOH, was titrated with
14.53 mL of the same EDTA titrant.
Another 50.00 mL aliquot was prepared
and buffered to pH 10.0, it required 23.55
mL Calculate the following:
a. Total hardness (ppm CaCO3).
b. Calcium hardness (ppm CaCO3).
c.
Magnesium hardness (ppm
MgCO3).'

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