Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Chapter 17, Problem 90AP

Consider a galvanic cell for which the anode reaction is
3 Pb ( s ) Pb 2 + ( 1.0 × 10 2 M ) + 2 e

and the cathode reaction is
VO 2 + ( 0.10 M ) + 2 H 3 O + ( 0.10 M ) + e V 3 + ( 1.0 × 10 5 M ) + 3 H 2 O ( l )

The measured cell potential is 0.640 V.
Calculate E ° for the VO 2 + | V 3 + half-reaction, using E ° ( Pb 2 + | Pb ) from Appendix E.

  • Calculate the equilibrium constant (K) at 25°C for thereaction

  • Pb ( s ) + 2 VO 2 + ( a q ) + 4 H 3 O + ( a q ) Pb 2 + ( a q ) + 2 V 3 + ( a q ) + 6 H 2 O ( l )

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