Thermodynamic equilibrium constants for silver(I) bromide complexes were determined by ion-selective membrane electrode potential measurements in water and in mixtures of water and acetone of approximately 5, 10 and 15 percent acetone by weight. Values of the solubility product constant were determined in each solvent system by calibration of a silver bromide membrane electrode with silver nitrate solutions and with sodium bromide solutions. Stability constants of silver(I) bromide complexes were determined using a silver ion-selective, silver sulfide membrane electrode in unsaturated solutions in which the formal concentrations of silver(I) and of bromide ranged from approximately I x 10-8 to 7 x 10-7 and 10-3 to 10-1 molal, respectively. Non-Nernstian electrode response was observed in these solutions. The magnitude of the corrections made for the non-linearity was found to be a function of formal silver concentration. Comparison of the values of the stability constants obtained with those reported in the literature substantiated the validity of the corrections. The data were interpreted by assuming the presence of AgBr, AgBr-2, and AgBr32-.
College and Department
Physical and Mathematical Sciences; Chemistry and Biochemistry
BYU ScholarsArchive Citation
Cummings, Arthur Lee, "Thermodynamic stability constants of silver bromide complexes in water and water-acetone mixtures determined by ion-selective electrode measurements" (1974). Theses and Dissertations. 8194.
Silver, Bromides, Complex ions