Studies on the Kinetic Behaviour of Cr(Ⅵ)in the Reaction Between Hydrogen Peroxide and Iodide

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (6): 871.

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Studies on the Kinetic Behaviour of Cr(Ⅵ)in the Reaction Between Hydrogen Peroxide and Iodide

ZHU Zhong-Liang¹, GU Zhi-Cheng¹, CHEN Rong-Mei²

1. Dept.of Chem.Tongji Univ., Shanghai 200092;
2. Wujin Chem Industry Co.

Received:1994-06-29 Revised:1994-11-12 Online:1995-06-24 Published:1995-06-24

Abstract

Abstract: The Kinetic behaviour of Cr(Ⅵ)in the reaction between I^-and H₂O₂in dilute H₂SO₄medium was investigated.It is found that Cr(Ⅵ)does not act as a catalyst of reaction between I^-and H₂O₂but act directly as a oxidizing agent of I^-.Amethod for calculating the reaction order is also proposed.It is unnecessary to know the concentration of reactant when this method is used.A Kinetic method for the simultaneous determination of Cr(Ⅵ)and Mo(Ⅵ)is proposed.The linear ranges of determination are 30～300 ng/mL for Cr(Ⅵ)and 2～20 ng/mL for Mo(Ⅵ),respectively.

Key words: Cr(Ⅵ)-I^--H₂O₂system, Kinetic analysis, Reaction order

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ZHU Zhong-Liang, GU Zhi-Cheng, CHEN Rong-Mei. Studies on the Kinetic Behaviour of Cr(Ⅵ)in the Reaction Between Hydrogen Peroxide and Iodide[J]. Chem. J. Chinese Universities, 1995, 16(6): 871.

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Studies on the Kinetic Behaviour of Cr(Ⅵ)in the Reaction Between Hydrogen Peroxide and Iodide

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