Calculate the reduction potential for the reduction reaction associated with each of the 6 half cells you coupled with the copper half-cell. Do so by using the measured cell potentials and assuming the reduction potential for your copper half cell is 0.34 volts.
assume Cuâ‚‚+ (aq) + 2 e <-> Cu(s) Er +0.34 volts voltaic cell Ecell - Eanode ?