Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 7 - Periodic Properties of the Elements - Additional Exercises - Page 294: 7.89c


It will expand.

Work Step by Step

Because the $Co^{4+}$ ions are reduced to $Co^{+3}$ and $Co^{+3}$ ions are larger than $Co^{+4}$ ions, the electrode expands.
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