A small amount of Mg-EDTA is often added in the titrimetric determination of water hardness. Why? A. Mg forms the most stable EDTA complex of all multivalent cations. B. It ensures that enough Mg ions are present for satisfactory indicator action. C. Mg-EDTA is inert and therefore does not influence the results, but it enhances indicator action. D. The Mg-EDTA dissociates after all the other cations have been titrated and therefore ensures that the end point is clearly visible.
A small amount of Mg-EDTA is often added in the titrimetric determination of water hardness. Why? A. Mg forms the most stable EDTA complex of all multivalent cations. B. It ensures that enough Mg ions are present for satisfactory indicator action. C. Mg-EDTA is inert and therefore does not influence the results, but it enhances indicator action. D. The Mg-EDTA dissociates after all the other cations have been titrated and therefore ensures that the end point is clearly visible.
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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A small amount of Mg-EDTA is often added in the titrimetric determination of water hardness. Why?
A. Mg forms the most stable EDTA complex of all multivalent cations.
B. It ensures that enough Mg ions are present for satisfactory indicator action.
C. Mg-EDTA is inert and therefore does not influence the results, but it enhances indicator action.
D. The Mg-EDTA dissociates after all the other cations have been titrated and therefore ensures
that the end point is clearly visible.
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