
Interpretation:
the method to reverse the spontaneous
Concept introduction:
If the electrode cell potential for a redox reaction is positive it becomes spontaneous.

Answer to Problem 55A
The spontaneous redox reaction of a voltaic cell can be reversed by applying a negative potential across its ends which is greater than the cell potential.
Explanation of Solution
By applying a negative potential across the terminals of the cell, the overall cell potential becomes negative and the reverse reaction becomes more favorable.
By applying a negative potential across the terminals of a voltaic cell its spontaneous reaction can be reversed.
Chapter 20 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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