A galvanic cell is based on the following half-reactions: Ag1 1 e2 88n Ag(s) %8 5 0.80 V Cu21 1 2e2 88n Cu(s) %8 5 0.34 V In this cell the silver compartment contains a silver elec- trode and excess AgCl(s) (Ksp 5 1.6 3 10210), and the copper compartment contains a copper electrode and [Cu21] 5 2.0 M. a. Calculate the potential for this cell at 258C. b. Assuming 1.0 L of 2.0 M Cu21 in the copper com- partment, calculate the moles of NH3 that would have to be added to give a cell potential of 0.52 V at 258C (assume no volume change on addition of NH3). Cu21(aq) 1 4NH3(aq) 34 Cu(NH3)421(aq) K 5 1.0 3 1013 Pb 1.8 M Pb2