Gce Model Questions Vol1 2024 Chemistry Question 10

A galvanic cell is constructed with a copper electrode immersed in 0.010 M Cu²⁺ solution and a zinc electrode immersed in 0.10 M Zn²⁺ solution at 25 °C. Standard reduction potentials are: Cu²⁺ + 2e⁻ → Cu E° = +0.34 V Zn²⁺ + 2e⁻ → Zn E° = –0.76 V (a) Write the overall cell reaction and calculate the standard electromotive force (E°cell). (b) Using the Nernst equation, determine the cell potential (Ecell) under the given concentrations. (c) If the cell operates until 0.001 mol of copper is deposited on the copper electrode (the solutions are each 1.00 L and concentrations are assumed to remain essentially constant), calculate the new cell potential. (d) Briefly discuss how an increase in temperature would affect the cell potential, citing the relevant thermodynamic relationship.