The complex solubility of silver chloride, silver bromide, silver iodide, and silver thiocyanate in mixtures of water with ethanol, methanol, acetone, and dioxane

The results of an investigation of the solubilities of silver chloride, silver bromide, silver iodide, and silver thiocyanate in water, in approximately 10, 20, 30, 40, and 50% by weight ethanol-water, methanol-water, acetone-water, and dioxane-water mixtures, and in an approximately 60% by weight dioxane-water mixture at 25°C are presented. The concentration of the anion of each of these four silver salts was varied between about 10^-5 and 10^-1 formal in each solvent. A radiotracer technique was used to determine the total silver content of these various solutions saturated with the appropriate slightly soluble silver salt. The results of "silver ion specific" electrode potential difference measurements in these saturated solutions were used in some of the calculations. Least-squares methods of data treatment were used to calculate the values of the thermodynamic equilibrium constants that describe the relationships among the various species in solution. A comparison of the results with the various theories of ionic interactions in solution is made and some of the inadequacies of these theories are discussed.