Chapter 16, Problem 88E

The following reaction occurs at the cathode of an electrochemical cell:

${\text{Ni}}^{2+}(aq)+2e^{-}\to \text{Ni}(s)$

Which anode reaction would produce a battery with the highest voltage?

a. $\text{Ag}(s)\to {\text{Ag}}^{+}(aq)+e^{-}$

b. $\text{Mg}(s)\to {\text{Mg}}^{2+}(aq)+2e^{-}$

c. $\text{Cr}(s)\to {\text{Cr}}^{3+}(aq)+3e^{-}$

d. $\text{Cu}(s)\to {\text{Cu}}^{2+}(aq)+2e^{-}$