Kinetic studies on the oxidation of iodide by peroxyacetic acid

被引：20

作者：

Awad, MI ^{[1
]}

Oritani, T ^{[1
]}

Ohsaka, T ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

INORGANICA CHIMICA ACTA | 2003年 / 344卷

关键词：

peroxyacetic acid; hydrogen peroxide; molybdate; kinetics; stopped-flow spectrophotometry;

D O I：

10.1016/S0020-1693(02)01337-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics of the oxidation of iodide by peroxyacetic acid (PAA) in aqueous media in the presence and absence of the heptamolybdate has been studied by a high time resolution spectrophotometric stopped-flow method. The time-dependent concentration of the liberated iodine was monitored by the change in absorbance at 352 nm. The effect of ammonium heptamolybdate as well as pH on the rate of the reaction was also studied and it was found that the rate of the reaction is independent of pH and molybdate concentration under the examined conditions. The results obtained show that the rate law of the reaction can be expressed as rate =k[PAA][I-] with a value of k=4.22 x 10(2) (mole/1)(-1) s(-1) at pH 3.5-5.4 and 25degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：253 / 256

页数：4

共 14 条

[1] THE OXIDATION OF IODIDE TO IODINE BY DILUTE SOLUTIONS OF ORGANIC PEROXIDES [J].