The iron content of foods can be determined by dissolving them in acid (forming Fe³⁺) ,reducing the iron(III) to iron(II) ,and titrating with cerium(IV) : Fe²⁺(aq) + Ce⁴⁺(aq) → Fe³⁺(aq) + Ce³⁺(aq) .
Identify the two half-reactions in the above reaction.

Question

Quizplus · Accepted Answer

The two half-reactions are:
Oxidation half-reaction: Fe2+(aq) → Fe3+(aq) + e-
Reduction half-reaction: Ce4+(aq) + e- → Ce3+(aq)
These half-reactions correspond to the oxidation of iron(II) to iron(III) and the reduction of cerium(IV) to cerium(III), respectively, in the overall reaction. Choice B correctly shows these half-reactions and their directions.

The Iron Content of Foods Can Be Determined by Dissolving