Masters Theses
Abstract
"The reduction of Ce(IV) in HC10₄ solutions by four polyaminocarboxylic acids, which are commonly used as chelating agents, has been studied by the stopped-flow technique. The rates of reduction first increase with increasing acidity, reach maxima which are characteristic of the chelating agent and the medium, then progressively decrease with increasing the acid concentration in the media. At their maximum reactivities, trans-1,2-diaminocyclohexane tetraacetic acid (CDTA) shows the highest reductive ability; this is followed by ethylenedinitrilotetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and finally nitrilotriacetic acid (NTA). The observed maxima can be qualitatively explained in terms of a mechanism which involves unhydrolyzed Ce⁴⁺ species and unprotonated polyaminocarboxylic acids. A comparison with the reactivities observed in H₂SO₄ media [S. B. Hanna, R. K. Hessley, w. H. Webb and w. R. Carroll, Z. Anal. Chem., in press (1971)] is presented and a mechanism for the EDTA oxidation, consistent with salt effects and the activation parameters, is advanced"--Abstract, page ii.
Advisor(s)
Hanna, Samir B.
Committee Member(s)
Carroll, William R.
Bolter, Ernst
Department(s)
Chemistry
Degree Name
M.S. in Chemistry
Sponsor(s)
University of Libya
Publisher
University of Missouri--Rolla
Publication Date
1971
Pagination
vii, 65 pages
Rights
© 1971 Salem Ahmed Attiga, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Complexometric titration
Transition metals
Perchlorates
Chelates
Thesis Number
T 2555
Print OCLC #
6034150
Electronic OCLC #
872275332
Link to Catalog Record
Recommended Citation
Attiga, Salem Ahmed, "A kinetic study of the reductive abilities of four polyaminocarboxylic acids (EDTA, CDTA, DTPA AND NTA) towards cerium(IV) in perchloric acid media" (1971). Masters Theses. 5495.
https://scholarsmine.mst.edu/masters_theses/5495
