(a) Balance the following half-reactions by the ion-electron half-reaction method:                           (i) (acid solution) MnO4 – (aq) → MnO2 (s)                          (ii) (acid solution) Pu4+ (aq) → PuO2 2+ (aq)                           (iii) (base solution) Cl– (aq) → ClO– (aq)                            (iv) (base solution) Cu2O (s) → Cu (s) (b) Which of the above equations are

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(a) Balance the following half-reactions by the ion-electron half-reaction method:

                          (i) (acid solution) MnO4 – (aq) → MnO2 (s)

                         (ii) (acid solution) Pu4+ (aq) → PuO2 2+ (aq)

                          (iii) (base solution) Cl– (aq) → ClO– (aq)

                           (iv) (base solution) Cu2O (s) → Cu (s)

(b) Which of the above equations are oxidation half-reactions?

(c) Give the formulas of the reactants that become oxidized in the course of the reaction.

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