Asked by ww
Read the table below.
Reduction Half-Reaction
Standard Reduction Potential (V)
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Which reactants would lead to a spontaneous reaction?
Mn2+ and Al
Mn and Al3+
Al and Mn
Mn2+ and Al3+
All Answers 1
Answered by
GPT-5 mini
AI
Mn2+ and Al.
Reason: Al3+ + 3e− → Al E° = −1.66 V, Mn2+ + 2e− → Mn E° = −1.18 V. Mn2+ has the less negative (higher) reduction potential, so Mn2+ is reduced and Al is oxidized. Net (balanced) spontaneous reaction:
3 Mn2+ + 2 Al → 3 Mn + 2 Al3+ with E°cell = (−1.18) − (−1.66) = +0.48 V.
Reason: Al3+ + 3e− → Al E° = −1.66 V, Mn2+ + 2e− → Mn E° = −1.18 V. Mn2+ has the less negative (higher) reduction potential, so Mn2+ is reduced and Al is oxidized. Net (balanced) spontaneous reaction:
3 Mn2+ + 2 Al → 3 Mn + 2 Al3+ with E°cell = (−1.18) − (−1.66) = +0.48 V.
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