Medium Effects for Single Ions in Dimethyl Sulfoxide, <i>N</i>,<i>N</i>′-Dimethylformamide, and Propylene Carbonate

Abstract

Abstract The solubility products of thallium halides were measured in dimethyl sulfoxide, N,N′-Dimethylformamide, and propylene carbonate for the purpose of obtaining the values of the medium effect for these electrolytes on transfer from water to these solvents. The medium effects for cations were estimated from the standard potentials of metal/ion couples obtained by the method of the corrected rubidium scale. The medium effects for halide ions were calculated from the medium effects for thallium halides and the thallium ion. A comparison of extrathermodynamic assumptions was made for the values of the medium effect for the silver ion as estimated by various methods ; the method of the corrected rubidium scale was found to give a reasonable result.