Document Details Document Type : Article In Journal  Document Title : Micellar and salt kinetic effects upon the reaction MnO 4 - + EDTA Micellar and salt kinetic effects upon the reaction MnO 4 - + EDTA   Subject : Chemistry  Document Language : English  Abstract : Conventional UV-visible spectrophotometric technique was used to study the kinetics of oxidation of ethylenediaminetetraacetic acid (EDTA) in presence and absence of cationic micelles of cetyltrimethylammonium bromide (CTAB) by MnO 4 - in alkaline medium. The reaction follows first-order kinetics with respect to each [MnO 4 -] and [OH -] in both media. The plots of log absorbance versus time clearly indicate that the oxidation process has an induction period followed by autoacceleration (sigmoid behaviour). The extent of the induction period depends on the experimental conditions. The rate constants increase with increasing [CTAB]. The observed catalytic effect has been discussed in terms of the incorporation/association/solublization of MnO 4 -, reactive species of EDTA and OH - into the Stern layer by using Menger-Portnoy model. The presence of NaCl and NaBr inhibits the reaction rate due to the exclusion of reactant from the Stern layer. On the bases of the observed results, the mechanism has been proposed and discussed.  ISSN : 1319-6103  Journal Name : Journal of Saudi Chemical Society  Volume : 15  Issue Number : 3  Publishing Year : 1432 AH 2011 AD  Article Type : Article  Added Date : Tuesday, June 5, 2012  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email Maqsood Ahmad Malik Malik, Maqsood Ahmad Researcher Doctorate maqsoodchem@gmail.com شعيل أحمد الثبيتي AL-Thabaitia, Shaeel Ahmed Researcher Doctorate sthabiti@hotmail.com عبدالرحمن عبيد اليوبي Al-Youbia, Abdulrahman Obaid Researcher Doctorate aalyoubi@kau.edu.sa ظهير خان Khan, Zaheer Researcher Doctorate drkhanchem@yahoo.co.in Files File Name Type Description  33489.pdf pdf Abstract Back To Researches Page