Graphically represent a battery suitable to measure the standard potential (E) of the redox couple Zn/Zn2+ and in which one of the half-cells is the standard hydrogen electrode (SHE). A) Write the reactions that take place in the two half-cells and the overall reaction B) Specify the concentrations or pressures of all species involved in the reaction C) Show how the electrons and ions move in the external circuit. (E Zn/Zn2+ = -0.76 V)