Question

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

(i) (acid solution) NO2 (g) → NO3 – (aq)

(ii) (acid solution) H2SeO3 (aq) → Se (s)

(iii) (base solution) P4 (s) → PH3 (g)

(iv) (base solution) Co(OH)3 (s) → CoO2 (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.

Answer 1

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