Two redox systems are shown below:
Cu2+(aq)+2e−⇌Cu(s)Eθ=+0.34 V \text{Cu}^{2+}(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{Cu}(\text{s}) \quad E^{\theta} = +0.34\text{ V} Cu2+(aq)+2e−⇌Cu(s)Eθ=+0.34 V Ag+(aq)+e−⇌Ag(s)Eθ=+0.80 V \text{Ag}^{+}(\text{aq}) + \text{e}^- \rightleftharpoons \text{Ag}(\text{s}) \quad E^{\theta} = +0.80\text{ V} Ag+(aq)+e−⇌Ag(s)Eθ=+0.80 VWhich species in the two redox systems is the strongest oxidising agent?
Cu(s)\text{Cu}(\text{s})Cu(s)
Cu2+(aq)\text{Cu}^{2+}(\text{aq})Cu2+(aq)
Ag(s)\text{Ag}(\text{s})Ag(s)
Ag+(aq)\text{Ag}^{+}(\text{aq})Ag+(aq)
