Why is the EV value for the Mn3+/Mn2+ couple much more positive than that for Cr3+/Cr2+ or Fe3+/Fe2+? Explain.
rishav kumar , 11 Years ago
Grade 9
1 Answers
Sunil Kumar FP
Last Activity: 10 Years ago
Much larger third ionisation energy of Mn (where the required change is d5 to d4) is mainly responsible for this. This also explains why the +3 state of Mn is of little importance
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