Table of Contents
International Journal of Inorganic Chemistry
Volume 2014, Article ID 768575, 4 pages
Research Article

Kinetics and Mechanism of the Oxidation of Naphthol Green B by Peroxydisulphate Ion in Aqueous Acidic Medium

1Department of Basic Research, National Research Institute for Chemical Technology, PMB 1052, Zaria, Kaduna State, Nigeria
2Department of Chemistry, Ahmadu Bello University, Zaria, Nigeria

Received 21 October 2013; Revised 21 February 2014; Accepted 24 February 2014; Published 25 March 2014

Academic Editor: Alfonso Castiñeiras

Copyright © 2014 B. Myek et al. 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.


The kinetics of the oxidation of naphthol green B (NGB3−) by peroxydisulphate ion has been carried out in aqueous acidic medium at of 700 nm, °C, and  mol dm−3 (NaCl). The reaction shows a first-order dependence on oxidant and reductant concentration, respectively. The stoichiometry of the NGB— reaction is 1 : 2. Change in hydrogen ions concentration of the reaction medium has no effect on the rate of the reaction. Added cations and anions decreased the rate of the reaction. The results of spectroscopic and kinetic investigation indicate that no intermediate complex is probably formed in the course of this reaction.