A 25-mL portion of an unknown solution containing Cu²+ and Fe³+ was titrated with 18.05 mL of 0.065 M EDTA. Another 25-mL portion of this solution was treated with NaF to form a strong Fe-F complex. This mixture was then titrated to endpoint with the same EDTA titrant and used a volume of 5.56 mL. Determine the molarity of Cu²+ and Fe³+ in the sample.

A 25-mL portion of an unknown solution containing Cu²+ and Fe³+ was titrated with 18.05 mL of 0.065 M EDTA. Another 25-mL portion of this solution was treated with NaF to form a strong Fe-F complex. This mixture was then titrated to endpoint with the same EDTA titrant and used a volume of 5.56 mL. Determine the molarity of Cu²+ and Fe³+ in the sample.

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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Question

2. A 25-mL portion of an unknown solution containing Cu²+ and Fe³+ was titrated with 18.05 mL of
0.065 M EDTA. Another 25-mL portion of this solution was treated with NaF to form a strong
Fe-F complex. This mixture was then titrated to endpoint with the same EDTA titrant and used
a volume of 5.56 mL. Determine the molarity of Cu²+ and Fe³+ in the sample.

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