|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2005
>
March
> |
|
In the Laboratory
|
|
|
|
Intercalates—Exciting Compounds for Solid–State Chemistry Studies
|
Kristy M. Blyth, Mark I. Ogden, David N. Phillips, David Pritchard, and Wilhelm van Bronswijk
Department of Applied Chemistry, Curtin University of Technology, Perth, Western Australia 6845, Australia
|
|
March 2005
Vol. 82 No. 3
p. 453
|
|
|
|
|
|
|
| Abstract |
|
This article describes a laboratory exercise that investigates the incorporation of the guest anion hexacyanoferrate(III) into the layered structure of lithium gibbsite chloride, and its subsequent removal from the lattice with sodium carbonate. X-ray diffraction is used to study the change in interlayer spacing, d upon incorporation of the guest ion into the lithium gibbsite structure. The experiment demonstrates the important relationship between the strength of host–guest interactions, and the size, shape, and particularly charge density of the guest anion. The experiment demonstrates a layer structure that expands upon the incorporation of a guest anion. In this experiment, the large guest hexacyanoferrate(III) anion enters the host lithium gibbsite chloride lattice, displacing the smaller chloride ion and causing an increase in the d spacing. The hexacyanoferrate(III) anion is removed from the lattice by treatment with the high charge density carbonate anion. The incorporation and release of the guest anion is essentially an anion-exchange mechanism, which may be compared and contrasted with other anion exchangers used in chemical practice. Flame atomic absorption spectrometry is used to quantify both the concentration of the guest anion remaining in solution after incorporation and after recovery of the guest ion from the host lattice.
|
| Supplement |
The experimental procedure and the CAS registry numbers of the chemicals used in this experiment are available.
|
 Contents |
JCE2005p0453W.doc (Microsoft Word)
|
| Download |
|
|
| More Information |
Citation |
Blyth, Kristy M.; Ogden, Mark I.; Phillips, David N.; Pritchard, David; van Bronswijk, Wilhelm. J. Chem. Educ. 2005 82 453.
|
Keywords |
Inorganic Chemistry; Quantitative Analysis; Solid-State Chemistry; X-ray Crystallography
|
History |
Created:
Last Updated: |
February 2, 2005
February 18, 2005
|
|
|
|
|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2005
>
March
> Page
453
|
|
|
| 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. |
|
