Premium
Kinetic study of the oxidation of indigocarmine by hydrogen peroxide with ferrous and ferric ions in acid medium
Author(s) -
Camarero Luis M.,
>Peche Roberto,
Collado Arancha
Publication year - 1997
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/(sici)1097-4601(1997)29:8<575::aid-kin2>3.0.co;2-r
Subject(s) - chemistry , ferrous , hydrogen peroxide , ferric , reagent , inorganic chemistry , salt (chemistry) , ion , kinetic energy , organic chemistry , physics , quantum mechanics
The use of hydrogen peroxide in addition to ferrous and ferric salts has been shown an effective method in the decoloration of indigocarmine (IDS), Indigo‐5,5′‐disulfonic acid disodium salt. The kinetic experiments control have been carried out by means of a conventional spectrophotometric technique. In acid medium and the initial absence of Fe +2 , the decoloration process obeys the following rate law: $-{{d[\rm{IDS}]} \over {dt}} = k_{\exp}[\rm{IDS}]$ Effects of reagents concentrations, temperature, and acidity on the rate experimental constant have been discussed. A feasible reaction mechanism is finally proposed. The rate equation deducted from the mechanism is according to the achieved experimental results. © 1997 John Wiley & Sons, Inc.