Surface tension measurements of alkali halide salts dissolved in ethylene glycol

CHED 1036

Yannika C. Marrs1, Maria J. Krisch, mkrisch@uci.edu1, Steven Baldelli, sbaldelli@uh.edu2, and John C. Hemminger, jchemmin@uci.edu1. (1) Department of Chemistry and AirUCI, University of California at Irvine, Irvine, CA 92697, (2) Department of Chemistry, University of Houston, Houston, TX 77204
Recently there has been significant new insight into the nature of the liquid vapor interface of aqueous salt solutions. However, little is known about the corresponding liquid vapor interface when an organic solvent is used. Our experiments examine the surface tension of electrolytes on the liquid-vapor interface of non-aqueous solutions. We studied a sequence of potassium halides; varying between F-, Cl-, Br-, and I-, using ethylene glycol as the solvent. There is little known about the effects of salt on the surfaces of ethylene glycol solutions. The surface tension of these alkali halide solutions was measured at a constant percent saturation. In addition, measurements were taken at varied salt concentrations to examine the concentration dependence of surface tension. The surface tension measurements compliment sum frequency vibrational spectroscopy studies of the same interface.
 

Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster

Division of Chemical Education

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008