To determine which of the following metals is the best reducing agent:
Find Standard reduction potentials:
Smaller (↓) E° → oxidation → stronger reducing agent
Larger (↑) E°→ reduction → weaker reducing agent
Cd2+(aq) + 2 e- → Cd(s) E° = -0.40 V
Mn2+(aq) + 2 e- →Mn(s) E° = -1.18 V
Al3+(aq) + 3 e- →Al(s) E° = -1.66 V
Cr3+(aq) + 3 e- →Cr(s) E° = -0.73 V
Which of the following metals is the best reducing agent?
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