87.12 Basic principal and application of electrolysis 1. Cathode reaction--residual concentration Potential sweep and residual concentration a(Pb2+)=33×10-49 a(Cu2)=22×1016 a(Ag+)=15×108 0.799V 0.337V 0.126V 1.56V The liberation order and the residual concentration of the ions upon negative shift of potential of cathodea(Ag+ ) = 1.510-8 0.799 V a(Cu2+) = 2.210-16 0.337 V a(Pb2+) = 3.310-49 -0.126 V -1.56 V The liberation order and the residual concentration of the ions upon negative shift of potential of cathode Potential sweep and residual concentration 1. Cathode reaction—residual concentration §7.12 Basic principal and application of electrolysis