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Densities and sound velocities of aqueous solutions of sodium octanoate were determined in a range of molalities between 0.0352 and 0.8105molkg1 at 25, 30, 35, 40 and 45C. The isotherms of molality dependence of both density and sound velocity were used to determine the cmcs. Apparent molar volumes and compressibilities were determined from measurements of ultrasound velocity and density. The values...
Abstract. The micellar properties of octyldimethylbenzylammonium bromide (C8BBr) in aqueous solution were studied by carrying out conductivity measurements at 20, 25, 30, and 37C, density measurements at 25 and 35C, and vapor pressure osmometry (v.p.o.) at 37C. For comparative purposes the latter technique was also applied for solutions of octyltrimethylammonium bromide. The three techniques yielded...
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