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When Pt electrodes are used in the electrolysis of KI(aq), a number of reactions are possible at the electrodes.  Using a standard reduction potentials table (given in Lecture 22), predict which reaction is most likely to occur at the anode.

When Pt electrodes are used in the electrolysis of KI(aq), a number of reactions are possible at the electrodes.  Using a standard reduction potentials table (given in Lecture 22), predict which reaction is most likely to occur at the anode.

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 160MP
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When Pt electrodes are used in the electrolysis of KI(aq), a number of reactions are possible at the electrodes. 

Using a standard reduction potentials table (given in Lecture 22), predict which reaction is most likely to occur at the anode. 

Select one:
a. 2 H2O (l)  →  O2 (g) + 4H+ (aq) + 4e-
b. 2I-(aq) → I2(s) + 2e-

c. 2 H2O (l) + 2e- →  H2 (g) + OH- (aq)

d. K+ + e- → K (s)

 

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