( begin aligned & E^ circ Ag^ + (aq) / Ag(s)=+0.799 ~V & E^ circ Ni^ 2+ (aq) / Ni(s)=-0.25 ~V & E^ circ Zn^ 2+ (aq) / Zn(s)=+0.76 ~V end aligned )

\begin{aligned} & \mathrm{E}^{\circ} \mathrm{Ag}^{+}(\mathrm{aq}) / \mathrm{Ag}(\mathrm{s})=+0.799 \mathrm{~V} \\ & \mathrm{E}^{\circ} \mathrm{Ni}^{2+}(\mathrm{aq}) / \mathrm{Ni}(\mathrm{s})=-0.25 \mathrm{~V} \\ & \mathrm{E}^{\circ} \mathrm{Zn}^{2+}(\mathrm{aq}) / \mathrm{Zn}(\mathrm{s})=+0.76 \mathrm{~V}\end{aligned}

JB 23