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Liquid-Liquid Equilibrium: Verification of the Lever Rule
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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.
Keywords (Audience):
Upper-Division UndergraduateKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
EquilibriumCiting Articles
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Interactive Two-Component Phase Diagrams
J. Charles WilliamsonJournal of Chemical Education2009 86 (5), 653Interactive Two-Component Phase Diagrams
J. Charles WilliamsonJournal of Chemical Education2009 86 (5), 653To help students connect a dynamic change of state with its representation on an equilibrium phase diagram, six interactive two-component phase diagrams have been created using Excel spreadsheets.
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- Received: August 03, 2009
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