Consider the following electrochemical cell: Zn(s) | Zn²⁺(aq) || Cu²⁺(aq) | Cu(s). Given E°(Zn²⁺/Zn) = -0.76 V and E°(Cu²⁺/Cu) = +0.34 V, what is the standard cell potential (E°cell)?
Correct: D
The standard cell potential (E°cell) is calculated as E°(cathode) - E°(anode). In this cell, Cu is being reduced (cathode) and Zn is being oxidized (anode). Therefore, E°cell = E°(Cu²⁺/Cu) - E°(Zn²⁺/Zn) = 0.34 V - (-0.76 V) = +1.10 V.