Zn(s)/Zn2+(aq)\mathrm{Zn}(\mathrm{s}) / \mathrm{Zn}^{2+}(\mathrm{aq})Zn(s)/Zn2+(aq)
Fe2+(aq)/Fe(s)\mathrm{Fe}^{2+}(\mathrm{aq}) / \mathrm{Fe}(\mathrm{s})Fe2+(aq)/Fe(s)
Zn(s)/Zn+(aq)\mathrm{Zn}(\mathrm{s}) / \mathrm{Zn}^{+}(\mathrm{aq})Zn(s)/Zn+(aq)
Cu2+(aq)/Cu(s)\mathrm{Cu}^{2+}(\mathrm{aq}) / \mathrm{Cu}(\mathrm{s})Cu2+(aq)/Cu(s)