Surface tension of aqueous binary solutions

Measurements of surlhcc tension have been perlbrmed to determine the effects of both temperature and concentration on the surface tension of aqueous solutions of D-Sorbitol, potassium chloride, and ammoniunl chloride. A differential capillary-rise med~od was employed lbr the measurements. The results showed that the surface tension of test solutions increased as the temperature decreased and that the surlllce tension of chloride solutions increased with an increase in its concentration, while Ibr D-Sorbitol solution the surlace tension decreased with increasing concentration. Correlation equations Ibr the surlace tension of tllree aqueous binary solutions as a function of temperature and concentration were determined.