Physical-chemical properties of solutions of the colloidal electrolyte hexanolamine oleate

Abstract

1. 1. Freezing-point, conductivity, viscosity and transport data have been given for aqueous solutions of hexanolamine oleate. 2. 2. The osmotic coefficients have been shown to follow Brady's curve for branched chain compounds, and the “critical concentration” has been calculated therefrom. 3. 3. The necessity for the existence in solution of “small micelles” or particles which contribute very little to the freezing point lowering but have a substantial conductivity is demonstrated by the fact that the conductivity ratio Λ Λ 0 is considerably higher than the osmotic coefficient. 4. 4. The cationic transport number is found to be negative and that for oleate radical is greater than unity at moderate concentrations, a further demonstration of the presence of conducting micelles, which, moreover, must include hexanolammonium ions.