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Moderate

Reduction Potentials

APCHEM-LXNJ4Y

Which of the following metals or metal ions can reduce iron?

$$Ag^+_{(aq)} + e^- \rightarrow Ag_{(s)} \ \ \ \ \ \ \ \ E^{\circ} = +0.80 \text{ V}$$
$$Cu^{2+}_{(aq)} + 2e^- \rightarrow Cu_{(s)} \ \ \ \ \ \ \ \ E^{\circ} = +0.34 \text{ V}$$
$$Pb^{2+}_{(aq)} + 2e^- \rightarrow Pb_{(s)} \ \ \ \ \ \ \ \ E^{\circ} = -0.13 \text{ V}$$
$$Fe^{2+}_{(aq)} + 2e^- \rightarrow Fe_{(s)} \ \ \ \ \ \ \ \ E^{\circ} = -0.44 \text{ V}$$
$$Al^{3+}_{(aq)} + 3e^- \rightarrow Al_{(s)} \ \ \ \ \ \ \ \ E^{\circ} = -1.66 \text{ V}$$

A

$Ag$

B

$Cu$

C

$Pb$

D

$Al$