Conductivity of Aqueous Potassium Dodecyl Sulfonate at Various Temperatures and with Solubilized Benzene

The specific conductivity of aqueous solutions of potassium dodecyl sulfonate has been measured as a function of concentration in the presence and absence of solubilized benzene in the temperature range between 25 and 60°C. Below the critical concentration for the formation of micelles solubilized benzene has no effect on the conductivity. In the critical concentration range there is a marked effect which decreases with salt concentration and finally becomes negligible. The critical concentration decreases in the presence of solubilized benzene; this effect becomes more marked as the benzene concentration is increased. The critical concentration increases with increasing temperature both in the presence and absence of benzene. The experimental part of this work was done at George Herbert Jones Laboratory, University of Chicago, III., U. S. A. The author would like to express his hearty gratitude to Dr. M. L. Corrin for many fruitful discussions during his stay at the University of Chicago, and for personal communications after his return to Formosa.