2. Nernst Equation (a) The electrochemical reaction for a SLI lead-acid battery is: Pb(s) PbO2(s) + 2HSO2(aq) + 2PbSO4(s) + 2H2O(1) (i) Write down the Nernst Equation of above reaction. E-2.041 V (6 marks) (ii) Explain why this Nernst Equation can be applied to probe the open-circuit of a lead-acid battery. (7 marks) (b) Water can undergo for oxidation or reduction reactions depending on experimental environment, the half reaction may be: Reduction: 2H,O+2e H, +20H Oxidation: 2H,0 0, +4H*+4c E = -0.83V E=-1.23V Calculate oxidation and reduction potential of pure water. (12 marks)