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  Home > JCE Print > Journal of Chemical Education > Issues > 2003  > April  >
In the Laboratory
Like Dissolves Like: A Guided Inquiry Experiment for Organic Chemistry
Ingrid Montes, Chunqiu Lai, and David Sanabria
Department of Chemistry, University of Puerto Rico, Río Piedras Campus, Río Piedras, PR 00931-3346
Cover
April 2003
Vol. 80 No. 4
p. 447
Abstract
This paper describes a demonstration and a straightforward experiment using the guided-inquiry approach for the "like dissolves like" principle that is implemented at the beginning of the academic year. This experiment extends the students' understanding of the concept of solubility of organic molecules and its relationship to chemical structure. It is also a stepping stone to their comprehension of separation techniques for organic compounds. The objective of this experiment is to observe how the solubility of alcohols varies in water, acetone, or hexane. This approach allows students to integrate different concepts of organic chemistry learned throughout the general chemistry course. These concepts include: covalent bond, dipole moment, molecular geometry, intermolecular forces, and solubility.
Supplement
Instructions for the students and notes for the instructor are available. Now also available are Spanish-language versions.
*  Contents Folder JCE2003p0447W containing JCE2003p0447W_sp.pdf and JCE2003p0447W.doc and JCE2003p0447W_sp.doc (Microsoft Word)
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*  Citation
 Montes, Ingrid; Lai, Chunqiu; Sanabria, David. J. Chem. Educ. 2003 80 447.
*  Keywords
 Inquiry-Based / Discovery Method; Organic Chemistry; Teaching/Learning Theory/Practice
*  History
 Created:
Last Updated:		 March 10, 2003
February 28, 2005
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