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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > October  >
In the Laboratory
A Laboratory Experiment for Measuring Solid–Liquid Mass Transfer Parameters
Sonia Dapía, Carlos Vila, Herminia Domínguez, and Juan Carlos Parajó
Department of Chemical Engineering, University of Vigo (Campus Ourense), 32004 Ourense, Spain
Cover
October 2004
Vol. 81 No. 10
p. 1502
Abstract
A mass transfer laboratory experiment based on candy dissolution is described. The dissolution of 1–4 spherical pieces of candy was followed spectrophotometrically, and material balances were carried out to calculate the size of solids from absorbance readings at selected times. The differential equation governing the process was solved numerically by a simplified method, and both the mass transfer coefficient and the saturation concentration were calculated by minimization of the sum of deviation squares. The calculated results provided a good interpretation of experimental data. The combination of the experimental procedure and the calculation method described in this article allowed a quantitative assessment on the solid–liquid mass transfer.
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Instructions for the students and notes for the instructor are available.
*  Contents JCE2004p1502W.doc (Microsoft Word)
 
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More Information
*  Citation
 Dapía,, Sonia; Vila, Carlos; Domínguez, Herminia; Parajó, Juan Carlos. J. Chem. Educ. 2004 81 1502.
*  Keywords
 Analytical Chemistry; Aqueous Solution Chemistry; Laboratory Instruction; Liquids; Solids; Solutions / Solvents; Water / Water Chemistry
*  History
 Created:
Last Updated:		 August 31, 2004
September 8, 2004
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