b) A galvanic cell consists of a Mg electrode in a 1.0MMg(NO3)2 solution and Ag electrode in a 1.0MAgNO3 solution. Appendix 2 shows list of standard reduction potentials at 25C. i) Express the half-cell reactions (2 marks) ii) Sketch the galvanic cell. In your diagram, show the direction of electron flow and identify the cathode and anode (5 marks) iii) Calculate the standard electromotive force (e.m.f) of this cell at 25C (2 marks)