3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL.

3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter10: Effect Of Electrolytes On Chemical Equilibria

Section: Chapter Questions

Problem 10.13QAP

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Question

3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem
2. The same amount of MgCl, is added as previously and the total volume of EDTA solution
required is 22.44 mL.
e) If 1 ppm CaCO;
= 1 mg/liter, what is the water hardness in
ppm CaCO;?
ppm CaCO,

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