Science and Education Publishing Journal of Materials Physics and Chemistry 1 4 2013 12 02 Conductometric and Thermodynamic Study of Copper and Nickel Sulfate in Aqueous Methanol Systems 69 75 EN Summyia Masood Department of Chemistry, University of Karachi, Karachi, Pakistan Rehana Saeed Sameera Razi Khan JMPC2013143 10.12691/jmpc-1-4-3 2013 11 01 2013 11 16 2013 12 02 The conductivities of copper sulfate and nickel sulfate solutions in aqueous and aqueous methanol systems (0 % to 40 % v/v) were measured in concentration range (1x10-3 to 10x10-3 mol.dm-3) at different temperatures (298 to 323 K). Conductometric data were used for the calculation of molar conductivity at infinite dilution (°m), degree of dissociation () and dissociation constant (Kd). The decreased in ion-solvent interaction with the increase in temperature, for individual electrolyte attributed to the increase in limiting molar conductance. Thermodynamic parameters such as energy of activation (Ea), free energy change of activation (G# ) and entropy change of activation (S# ) were also calculated at various temperatures as a function of concentration of electrolytes in aqueous and aqueous methanol systems.