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Select the single best answer. Consider the following half-reactions: MnO4−(aq) + 8H+(aq) + 5e−→ Mn2+(aq) + 4H2O(l) NO3−(aq) + 4H+(aq) + 3e− → NO(g) + 2H2O(l) Will NO3− oxidize Mn2+ to MnO4− under standard-state conditions? NO3− ions will oxidize Mn2+ to MnO4− under standard state conditions. NO3− ions will not oxidize Mn2+ to MnO4− under standard state conditions.

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Answer:

NO3− ions will not oxidize Mn2+ to MnO4− under standard state conditions.

Explanation:

The reduction potential of NO3^- is +0.96V while the reduction potential of MnO4^- is +1.51V. Hence looking at the reduction potential values stated above, NO3^- will not oxidize Mn^2+ to MnO4^-.

The MnO4^- having a greater reduction potential will be reduced to Mn^2+ while NO3^- will be oxidized to NO.