**Question:**To determine the concentration of Ni²⁺ in an unknown solution, a known excess of EDTA is added to the solution. The pH is then adjusted using an appropriate buffer. Finally, the excess EDTA is back-titrated with a standard Zn²⁺ solution.1. What pH range should the solution be buffered to if xylenol orange is used as the indicator?- ○ pH 11–12- ○ pH 9–10- ○ pH 5–6- ○ pH 7–82. What color change will be observed at the end point?- ○ red to violet- ○ red to yellow- ○ violet to red- ○ yellow to red

The pH range that should be buffered to if xylenol orange is used as the indicator is pH 5-6

What pH range should the solution be buffered to if xylenol orange is used as the indicator? pH 11–12 pH 9-10 pH 5–6 pH 7-8 What color change will be observed at the end point? red to violet red to yellow violet to red yellow to red

What pH range should the solution be buffered to if xylenol orange is used as the indicator? pH 11–12 pH 9-10 pH 5–6 pH 7-8 What color change will be observed at the end point? red to violet red to yellow violet to red yellow to red

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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