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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > March  >
In the Laboratory
Liquid-Liquid Equilibrium: Verification of the Lever Rule
A. D. Jordan
Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada
Cover
March 2000
Vol. 77 No. 3
p. 395
Abstract
A simple experimental extension to the traditional determination of the mutual solubility curve for a binary system of partly miscible liquids is presented for the methanol-cyclohexane system. It allows for the determination of the composition of one of the phases and the ratio of its mass to the total mass of the mixture, at a given temperature. These values are compared to those obtained from the solubility curve and the use of the lever rule. The experiment helps students in the understanding of phase diagrams and the agreement between the two methods gives credence to the lever rule.
Supplement
Objective, theory, figure of solubility determination apparatus, procedural notes, and Determination of the Mutual Solubility Curve are included.
*  Contents
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*  Citation
 Jordan, A. D. J. Chem. Educ. 2000 77 395.
*  Keywords
 Equilibrium; Laboratory Instruction; Liquids; Phase Transitions / Diagrams; Physical Chemistry; Solutions / Solvents
*  History
 Created:
Last Updated:		 February 14, 2000
August 31, 2005
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