A computational model for quantitatively describing the behavior of four simultaneous chemical reactions taking place on two copper electrodes in a Cu-Cu electrolysis cell is formulated. The individual reaction rates, corresponding current densities and total cell current and voltage are obtained as direct model output. The model parameters are found based on cyclic voltammetry experiments done in a Cu-Cu electrolysis cell with CUSO4 (aq) concentrations between 0.1 M and 1 M. The model is fit against the data of one experiment and compared against a series of other measurements. A full set of model parameters is given and the effect of selected parameters on the simulated current-time response is analyzed. (C) 2009 Elsevier Ltd. All rights reserved.