Osmotic coefficients of low-equivalent-weight organic salts

Osmotic coefficients of low-equivalent-weight organic salts. 2

“…We have reported the isoplestic results of four two-component systems composed of sodium alkylbenzenesulfonate and water, and one three-component system containing sodium p-cymenesulfonate/NaCI/H20 at 25 °C (1). Although we found some indication In these low-equivalent-weight sulfonate systems of the presence of either small aggregates or strong in- teractions between the ions, there appeared to be no evidence for micelles, commonly encountered with surfactants.…”

“…The source of sodium benzoate and salicylates used in this paper can be found in ref 3 and 4. Osmotic coefficients = -(55.51/Em;) In as (1) i were measured by the isopiestic method, in which solutions are equilibrated to the same vapor pressure with a solution of a reference salt of known dependence of solvent activity (as, pure solvent being the standard state) on molality. The reference salts (subscript r) were NaCl or KCI, and the osmotic coefficients of NaCl and KCI were taken from ref 7. The number 55.51 is for an aqueous solution and refers to the moles of water/kg solvent, and / ?/ is the total number of moles of solute tons/kg of solvent.…”