Vol. 6, Issue 3 (2018)
Kinetics and mechanism study of oxidation of sodium thiosulfate and sodium sulfite By Potassium ferrate (VI) in alkaline media
Author(s): Chaochao Chen, Jinhuan Shan, Hong Zhang, Yannan Mao, Xiaofang Li and Dan Su
Abstract: In the temperature range of 288.2K-308.2K, the kinetics of oxidation of Sodium thiosulfate and Sodium sulfite by Potassium Ferrate (VI) has been studied spectrophotometrically. All data was obtained from the pseudo-first order reaction. It was found that the reaction is a first-order for reactant. The observed rates constants (kobs) increase with the increase of [reductant], however, the kobs decrease with the increase of [OH-]. The reaction is negative fraction order with respect to [OH-]. A plausible echanism involving a slow reaction as the rate-controlling step is proposed and the rate equations derived from the mechanism can explain all the experimental results. The rate constants of the rate-controlling step and the thermodynamic activation parameters at 298.2K were also calculated.
Pages: 1450-1455 | 521 Views 69 Downloads
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How to cite this article:
Chaochao Chen, Jinhuan Shan, Hong Zhang, Yannan Mao, Xiaofang Li, Dan Su. Kinetics and mechanism study of oxidation of sodium thiosulfate and sodium sulfite By Potassium ferrate (VI) in alkaline media. Int J Chem Stud 2018;6(3):1450-1455.
