Neco 2019 Chemistry Question 19

A galvanic cell is constructed as \(\text{Zn}\,|\,\text{Zn}^{2+}(0.010\,\text{M})\,||\,\text{Cu}^{2+}(0.050\,\text{M})\,|\,\text{Cu}\) at 25\(^\circ\)C. Standard reduction potentials are \(E^{\circ}(\text{Zn}^{2+}+2e^{-}\rightarrow\text{Zn})=-0.76\,\text{V}\) and \(E^{\circ}(\text{Cu}^{2+}+2e^{-}\rightarrow\text{Cu})=+0.34\,\text{V}\). (a) Calculate the cell EMF under the given concentrations using the Nernst equation. (b) If the cell is allowed to run until \([\text{Cu}^{2+}] = 0.010\,\text{M}\) and \([\text{Zn}^{2+}] = 0.050\,\text{M}\), what is the new EMF? (c) Determine the maximum electrical work obtainable per mole of Zn oxidised under the initial conditions.