Question

Balance the following reaction in a basic solution: (5 marks) I - + MnO4 2- → MnO2 + I2

Answer 1

Solution:

2I^- - 2е- → I₂ (oxidation)

MnO₄^2- + 2H₂O + 2е- → MnO₂ + 4OH^- (reduction)

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2I^- + MnO₄^2- + 2H₂O → I₂ + MnO₂ + 4OH^-