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Quiz #5

Open Notes, Open Neighbor

On a piece of paper put your Name, Student ID Number and Answer to:


Complete and balance the following reaction:

MnO4(aq) + Ce3+(aq) Mn2+(aq) + Ce4+(aq) (pH = 1)



Answer:

Oxidation:

Ce3+(aq) Ce4+(aq) + e

Reduction:

MnO4(aq) + 8 H+(aq) + 5 e Mn2+(aq) + 4 H2O(l)

Multiplying the oxidation reaction by 5 and adding the two half-reactions gives:

MnO4(aq) + 8 H+(aq) + 5 Ce3+(aq) Mn2+(aq) + 5 Ce4+(aq) + 4 H2O(l)