Question:
Why is E for Mn3+/Mn2+ redox couple more positive?
Why is E for Mn3+/Mn2+ redox couple more positive?
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A higher E° value indicates a greater tendency for reduction — Mn\textsuperscript{3+} is readily reduced due to instability in aqueous medium.
Updated On: Jul 8, 2025
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Solution and Explanation
Step 1: Mn3+ has a high charge density and causes strong hydration, making it less stable.
Step 2: Due to instability, Mn3+ has a high tendency to gain an electron (i.e., get reduced).
Step 3: Hence, the redox potential (E°) becomes more positive for the Mn3+/Mn2+ couple.
Step 2: Due to instability, Mn3+ has a high tendency to gain an electron (i.e., get reduced).
Step 3: Hence, the redox potential (E°) becomes more positive for the Mn3+/Mn2+ couple.
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