JCE Online Journal of Chemical EducationDivision of Chemical Education, American Chemical SocietyAmerican Chemical Society
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 

JCE Print
   Current Issue
 Previous Issues
 Supplements
 Search JCE Index

JCE Digital Library
   JCEDLib Catalogue
   ChemInfo
 Data-Driven Exercises
 DigiDemos
 Featured Molecules
 LivTexts
 LrnCom
 QBank
 SymMath
 WebWare

JCE Software
   Latest Releases
 Software & Video
 Downloads
 Support

Only@JCE Online
   JCE Online Store
 JCE HS CLIC
 JCE Discussion Forums
   Biographical Snapshots
 ChemEd Resource Shelf
 Featured Molecules
 Hal's Picks
 Project Chemlab
 Reviewed WWW Sites
 "Web-Ed" Articles

About JCE
   Features
 Publications
 Operations
 Outreach
 Contact Us


  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > December  >
In the Laboratory
Filtrates and Residues
An Empirical Formula from Ion Exchange Chromatography and Colorimetry
Steven D. Johnson
Churchill County High School, Fallon, NV 89406
Cover
December 1996
Vol. 73 No. 12
p. 1179
Abstract
Experimental determination of the empirical formula for sodium salicylate, Nax(C7H5O3)y, using colorimetry and cation exchange. A Beer's Law plot is prepared for salicylate using 0.0050 M salicylic acid solution. Colorimetric analysis is performed on the salicylate ion in the form of an aqueous ferric complex, which is intensely violet-red, using a simple, inexpensive colorimeter constructed from readily available electronic parts and PVC pipe. Determination of sodium content is conducted using cation exchange, using simple re-usable exchange columns, followed by titration with OH-. The procedure is involved, yet has been conducted by high school chemistry students as a lab final.
More Information
*  Citation
 Johnson, Steven D. J. Chem. Educ. 1996 73 1179.
*  Keywords
 Laboratory Instruction
*  History
 Created:
Last Updated:		 August 5, 1999
February 21, 2006
<< Previous Article Table of Contents Next Article >>
  Home > JCE Print > Journal of Chemical Education > Issues > 1996 > December > Page 1179



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

Comments to
jceonline@chem.wisc.edu		 Copyright © Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.