Answer
Au
Work Step by Step
The weakest reducing agent is the product in the half reaction with highest positive $E^{o}$ value (as half reactions are reductions) . In this case, it is Au. It has the least tendency to undergo oxidation.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 17 - Electrochemistry and Its Applications - Questions for Review and Thought - Topical Questions - Page 782b: 32d
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