Kinetics and Mechanism of the Periodate Oxidation of Malachite Green in Acidic Medium
S. O. Idris, H. Hassan, J. F. Iyun, Y. Mohammed
Journal of Scientific Research and Reports · pp. 551–560 · Published 5 Nov 2014
10.9734/JSRR/2015/12423Abstract
The kinetics of the periodate (IO4–) oxidation of malachite green (MG+) have been studied in aqueous acidic medium. The observed results at [H+] = 1 x 10–4 mol dm–3 (HCl), ionic strength of reaction medium, I = 0.5 mol dm–3 and T = 25.5±0.3°C are consistent with the rate law: −d[MG+]/dt = k2[MG+][IO4-] where k2 = (k7 + k6K5[H+]) The reaction was catalysed by increase in [H+] and added anions but displayed a negative BrØnsted–Debye salt effect. Spectrophotometric test showed the absence of intermediate complex formation. Based on these findings, a plausible mechanism is proposed.
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Cited by 2
B. Myek, S. Idris, A. D. Onu · 2021
Z. A. Ayoub, O. A. Yazbeck, M. M. Jamal · 2017
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