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  Home > JCE Print > Journal of Chemical Education > Issues > 1995  > December  >
General Interest
A Ternary Phase Diagram for a Less Hazardous System
Barbara A. Udale and John D. Wells
La Trobe University, P. O. Box 199, Bendigo, Victoria 3550, Australia
Cover
December 1995
Vol. 72 No. 12
p. 1106
Abstract
The ternary phase diagram for the partially miscible liquid system n-propanol-n-heptane-water can be determined readily in an undergraduate laboratory experiment. The coexistence curve is obtained from titration results. Tie lines are then estimated from the compositions of pairs of phases in equilibrium, the propanol concentrations being determined by gas chromatography. The reagents are less hazardous than those of the classic acetic acid-chloroform-water system, and the gas chromatographic analysis has more interest for students than the acid-base titrations of the older experiment.
More Information
*  Citation
 Udale, Barbara A.; Wells, John D. J. Chem. Educ. 1995 72 1106.
*  Keywords
*  History
 Created:
Last Updated:		 10/1/1999
5/22/2006
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