Journal of Chemistry

Journal of Chemistry / 2009 / Article

Open Access

Volume 6 |Article ID 965619 | 6 pages | https://doi.org/10.1155/2009/965619

Spectrophotometric Evaluation of Stability Constants of Copper, Cobalt, Nickel and Zinc with 2-Thiobarbituric Acid in Aqueous Solution

Received23 Dec 2008
Accepted20 Feb 2009

Abstract

Stoichiometry and equilibrium study of ion-ligand conducted in aqueous solution by spectrophotometry. Stability constants of the complexes are determined at 25 °C, ionic strength was adjusted to 0.2 (% w/v) with NaCl. The pH was adjusted to 6. 2-Thiobarbituric acid-ion complexesʼ stability was calculated in aqueous solution using DATAN (Data Analysis program). The results of this method denote formation specie ML2. The log K for ions Cu+2,Co+2, Ni+2 and Zn+2 were 4.89, 4.69, 4.47 and 4.82, respectively.

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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