2. (a) Draw schematic diagrams of the current obtained at a platinum electrode when the potential is scanned from 600 to -200 and back to 600 mV (i) in a solution containing 0.1 M KCI (ii) in a solution containing the reversible redox couple, Co(phen)32 at a concentration of 1 mM and KC1 (0.1 M) 2+/3+ Co(phen)33++ e¯ Co(phen) 32+ Eº = 0.1 V (iii) (iv) Describe and explain the features of the current and potential obtained in both cases. Estimate the double layer capacitance of the electrode solution interface given that the current in a solution containing 0.1 M KCl was constant with a value of 0.5 µA, over the potential range 100 to 200 mV. The scan rate was 20 mV s¨¹.

2. (a) Draw schematic diagrams of the current obtained at a platinum electrode when the potential is scanned from 600 to -200 and back to 600 mV (i) in a solution containing 0.1 M KCI (ii) in a solution containing the reversible redox couple, Co(phen)32 at a concentration of 1 mM and KC1 (0.1 M) 2+/3+ Co(phen)33++ e¯ Co(phen) 32+ Eº = 0.1 V (iii) (iv) Describe and explain the features of the current and potential obtained in both cases. Estimate the double layer capacitance of the electrode solution interface given that the current in a solution containing 0.1 M KCl was constant with a value of 0.5 µA, over the potential range 100 to 200 mV. The scan rate was 20 mV s¨¹.

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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