Author Question: The iron content of foods can be determined by dissolving them in acid (forming Fe3+), reducing the ... (Read 73 times)

oliviahorn72 · **on:** Feb 15, 2020

Question 1

What is the reduction half-reaction for the following overall cell reaction?

Ni2+(aq) + 2 Ag(s) → Ni(s) + 2 Ag+(aq)

◦ Ni2+(aq) + 2 e- → Ni(s)
◦ Ni2+(aq) + e- → Ni(s)
◦ Ag(s) + e- → Ag+(aq)
◦ Ag+(aq) + e- → Ag(s)

Question 2

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.
◦

oxidation half-reaction

reduction half-reaction

Fe2+(aq) + e-→ Fe3+(aq)

Ce4+(aq) → Ce3+(aq) + e-

◦

oxidation half-reaction

reduction half-reaction

Ce4+(aq) + e- → Ce3+(aq)

Fe2+(aq) → Fe3+(aq) + e-

◦

oxidation half-reaction

reduction half-reaction

Ce4+(aq) → Ce3+(aq) + e-

Fe2+(aq) + e- → Fe3+(aq)

◦

oxidation half-reaction

reduction half-reaction

Fe2+(aq) → Fe3+(aq) + e-

Ce4+(aq) + e- → Ce3+(aq)

olderstudent · **Reply #1 on:** Feb 15, 2020

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