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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > September  >
In the Classroom
Improving Conceptions in Analytical Chemistry: ci Vi = cf Vf
Margarita Rodríguez-López
Department of Chemistry, Pontifical Catholic University of Pueto Rico, Ponce, PR 00731

Arnaldo Carrasquillo Jr.
Department of Chemistry, University of Puerto Rico, Mayaguez, PR 00681-9019

Cover
September 2005
Vol. 82 No. 9
p. 1327
Abstract
A common misconception related to analytical chemistry, which may be generalized as the failure to recognize and to account analytically for changes in substance density, is discussed. A cautionary example is made through the use of mass-based units of composition during volumetric dilution. The correct application of the volumetric dilution equation ci Vi = cf Vf is discussed. A quantitative description of the systematic error introduced by incorrect use of the volumetric dilution equation is also specified.
More Information
*  Citation
 Rodríguez-López, Margarita; Carrasquillo, Arnaldo, Jr. J. Chem. Educ. 2005 82 1327.
*  Keywords
 Analytical Chemistry; First-Year Undergraduate / General; High School / Introductory Chemistry; Industrial Chemistry; Misconceptions / Discrepant Events; Nomenclature / Units / Symbols; Physical Chemistry; Quantitative Analysis; Solutions / Solvents
*  History
 Created:
Last Updated:		 August 2, 2005
August 10, 2005
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