49. The figure is an anodic scan or a quiescent solution cyclicvoltammetry experiment of a redox couple at a 1.0 mmdiameter platinum electrode at a scan rate of 100 mV/s.What causes the decrease in current at potentials morepositive than +0.2 V?Current, AScan Direction-0.20.2Potential, V0.40.6(A) Electron-transfer rates slow at more positivepotentials.(B) All of the reduced species in solution have beenoxidized.(C) Mass transport is limited by the rate of diffusion ofreduced species to the electrode surface.(D) The oxidized species formed in the reaction producean insulating layer on the electrode surface.

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49. The figure is an anodic scan or a quiescent solution cyclic voltammetry experiment of a redox couple at a 1.0 mm diameter platinum electrode at a scan rate of 100 mV/s. What causes the decrease in current at potentials more positive than +0.2 V? Current, A Scan Direction -0.2 0.2 0.4 0.6

49. The figure is an anodic scan or a quiescent solution cyclic voltammetry experiment of a redox couple at a 1.0 mm diameter platinum electrode at a scan rate of 100 mV/s. What causes the decrease in current at potentials more positive than +0.2 V? Current, A Scan Direction -0.2 0.2 0.4 0.6

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

49. The figure is an anodic scan or a quiescent solution cyclic
voltammetry experiment of a redox couple at a 1.0 mm
diameter platinum electrode at a scan rate of 100 mV/s.
What causes the decrease in current at potentials more
positive than +0.2 V?
Current, A
Scan Direction
-0.2
0.2
Potential, V
0.4
0.6
(A) Electron-transfer rates slow at more positive
potentials.
(B) All of the reduced species in solution have been
oxidized.
(C) Mass transport is limited by the rate of diffusion of
reduced species to the electrode surface.
(D) The oxidized species formed in the reaction produce
an insulating layer on the electrode surface.

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