|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
1997
>
December
> |
|
In the Laboratory
|
|
|
|
Complexometric Titration of Zinc: An Analytical Chemistry Laboratory Experiment
|
S. G. Novick
Hofstra University, Department of Chemistry, Hempstead, NY 11549-1350
|
|
December 1997
Vol. 74 No. 12
p. 1463
|
|
|
|
| Abstract |
|
Complexometric titrations with EDTA have traditionally been performed in undergraduate analytical chemistry courses to determine the calcium or magnesium content of water. These titrations are performed at a basic pH, where the formation constants of Ca-EDTA and Mg-EDTA complexes are high. These types of problems are well-treated in the analytical chemistry textbooks. In contrast, treatment of metal ions whose EDTA complexes occur significantly at low pH (e.g., Zn2+, Fe3+, Cu2+, Ni2+, Pb2+, Al3+) is sparse. An incorrect conclusion can be reached by the student that practical EDTA titrations are only performed at high pH. In addition, widening the window of possible metal ions for complexometric titration affords the possibility of analyzing real world products, such as the cold lozenges discussed in the article.
|
|
| More Information |
 Citation |
Novick, S. G. J. Chem. Educ. 1997 74 1463.
|
Keywords |
Analytical Chemistry, Zinc, Titrimetry, and Laboratory Instruction
|
History |
Created:
Last Updated: |
July 20, 1999
June 23, 2005
|
|
|
|
|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
1997
>
December
> Page
1463
|
|
|
| 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.
|
| 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.
|
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.
|
| Contributions Welcome |
| JCE welcomes your submission |
| Fishing for New Ideas |
 Always in the
process of
improving, CLIC
welcomes ideas and comments.
Email Us |
|
