A water was tested for water hardness. A 50.00 mL aliquot was prepared and buffered to pH 10.0, it required 23.55 mL of 0.0250 M EDTA. A second aliquot, prepared with NaOH, was titrated with 14.53 mL of the same EDTA titrant. Calculate the total hardness of the water (expressed in ppm CaCO₃). a. 2 ppm b. 1179 ppm c. Insufficient data d. 2 ppm   Calculate the calcium hardness of the water (expressed in ppm CaCO₃).  a. Insufficient data b. 1179 ppm c. 2 ppm d. 2 ppm   Calculate the magnesium hardness of the water (expressed in ppm MgCO₃) a. 2 ppm b. Insufficient data c. 2 ppm d. 1179 ppm

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter17: Complexation And Precipitation Reactions And Titrations
Section: Chapter Questions
Problem 17.42QAP
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A water was tested for water hardness. A 50.00 mL aliquot was prepared and buffered to pH 10.0, it required 23.55 mL of 0.0250 M EDTA. A second aliquot, prepared with NaOH, was titrated with 14.53 mL of the same EDTA titrant.

Calculate the total hardness of the water (expressed in ppm CaCO₃).

a. 2 ppm

b. 1179 ppm

c. Insufficient data

d. 2 ppm

 

Calculate the calcium hardness of the water (expressed in ppm CaCO₃). 

a. Insufficient data

b. 1179 ppm

c. 2 ppm

d. 2 ppm

 

Calculate the magnesium hardness of the water (expressed in ppm MgCO₃)

a. 2 ppm

b. Insufficient data

c. 2 ppm

d. 1179 ppm

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