Abstract
This work introduces a newly developed kinetic mechanism and thermodynamic study that gives a clear theoretical insight between the iodine and chromium in acid solution. The paper mainly focuses on evaluating kinetic mechanism and thermodynamic properties of the oxidation of iodide by dichromate ion in acidic medium. This study was investigated using iodometric method. The rate has been studied by appropriate choice of concentrated conditions at constant temperature and ionic strength. The kinetic studies revealed half order reaction with respect to dichromate ion, first order for iodide ion and second order for hydrogen ion concentration. The dependence of reaction rate on the temperature was monitored in order to generate some thermodynamic parameters, which can be used in predicting the direction and spontaneity of the reaction. The thermodynamic studies of this reaction revealed negative values for ΔG, ΔS and positive values for ΔH which is an indication that the reaction wasspontaneous and endothermic. The oxidant chromium (vi) exist in acidic media as H2CrO4. The effect of ionic strength on the rate of redox reaction was investigated. The ionic strength was adjusted by varying the concentration of the nitrate to maximum. The effect of temperature was also studied to evaluate the thermodynamic parameters. Transition metals should be use as catalyst for future purpose to monitor the rate of redox reaction. The techniques employed on this research are very useful in determining the rate of a redox reaction.
 Keywords: Kinetic, thermodynamic, oxidation, iodometric method
Highlights
Kinetics provides useful information about the mechanism and rate of chemical reaction, which helps to run a chemical reaction successfully by a way of selecting optimum condition as to get maximum yield
Kinetic study helps us to Study the factors which influence the rate of reaction like temperature, pressure, substrate concentration, oxidant concentration, composition of reaction mixture and catalyst while Mechanistic study gives a clear theoretical insight between the iodine and chromium (vi) solution in the presence of acid solution, kinetics plays a very important role in the investigation of the reaction of oxidation of iodide compound carried out by oxidizing agent like potassium dichromate (VI) (Fawzy et al, 2014a ; Sayyed et al, 2011)
According to the literature survey, considerable amount of work has been done on the oxidation of organic compounds (Sayyed et al, 2011; Fawzy et al, 2014b; Sayyed et al, 2010; Odebunmi et al, 2009; Anweting et al, 2012; Goel, 2010, Khan; Id-Din, 2001) by potassium permanganate, but scanty on the kinetics oxidation of iodide ion by dichromate ion in acidic medium (Ignaz et al, 1997; Isa and kolo, 2015)
Summary
Kinetics provides useful information about the mechanism and rate of chemical reaction, which helps to run a chemical reaction successfully by a way of selecting optimum condition as to get maximum yield. According to the literature survey, considerable amount of work has been done on the oxidation of organic compounds (Sayyed et al, 2011; Fawzy et al, 2014b; Sayyed et al, 2010; Odebunmi et al, 2009; Anweting et al, 2012; Goel, 2010, Khan; Id-Din, 2001) by potassium permanganate, but scanty on the kinetics oxidation of iodide ion by dichromate ion in acidic medium (Ignaz et al, 1997; Isa and kolo, 2015). The objective of this study is to propose kinetic mechanism and evaluate the thermodynamic properties of the oxidation of iodide ion by dichromate ion in acidic medium
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
