JCE Online Journal of Chemical Education
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 



  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, UnivPontifical Catholic Universuty 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
<< Previous Article Table of Contents Next Article >>
  Home > JCE Print > Journal of Chemical Education > Issues > 2005 > September > Page 1327



Chemistry Teacher Connection

The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
More About CTC
Order the Chemistry Teacher Connection

C&EN CLICs

Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students. 
 C&EN CLICs

JCE Collections Available
Occasionally, collections of JCE back issues become available for donation to individual teachers, schools, or libraries. JCE matches collections with interested recipients. Recipients pay shipping costs or pick up the collection.
 List of available collections

Contributions Welcome
JCE welcomes your submission
 Contributors's Corner

Subscriptions
 Subscription Info
 Order Forms

Fishing for New Ideas
Always in the
process of
improving, CLIC
welcomes ideas and comments.

Email Us

NSF logoDivCHEDACS ACS PubsFor journals in other fields of chemistry visit ACS Publications.
Comments to
jceonline@chem.wisc.edu		 Copyright © 2008 Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.		  Terms | Privacy