|
|
| 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
|
|
|
| JCE HS CLIC |
|
Our Secondary School editors work hard to distill all the JCE materials to produce a fraction of particular interest to high school teachers. We call it CLIC.
|
| Contributions Welcome |
| JCE welcomes your submission |
| Advertisers |
| In recent years we have worked hard to better match our advertisers with our readers. When shopping for chemistry education materials, visit our advertisers' WWW sites first. |
| Be An Ambassador |
| Take JCE along on your outreach missions. Copies of the Journal, guest access to JCE Online, our publications catalog, and more are available for your participants. |
|
