Q2 (5 marks) Consider the redox reaction: 4MnO4 +12H+ + 4Mn+ + 6H20 + 502 (a) Write the electrodes half reactions. (1 mark) Cathode: Anode: (b) Write the Nernst equation in terms of concentrations and pressures. (2 marks) (c) If pH = 5, Po, = 1 bar, [Mno,] = [Mn?"] = 1 M, calculate Ecell. (2 marks) (5 marks) Q3 Given at 298 K, (1) Fe3+ +et Fe2+ (2) [Fe(CN)6]3- + 4 = [Fe(CN)6]* (3) Fe2+ +6CN [Fe(CN).]* E 0.77 V AG' = - 34.74 kJ/mol K=1035 (a) Calculate K for Fe3+ + 6CN=[Fe(CN).]?- (4 marks) (b) To which direction will the equilibrium shift under standard condition? (1 mark)