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R. S. Lokhande, P. U. Singare

Comparative study on ion-isotopic exchange reaction kinetics by application of tracer technique

Keywords: Kinetics, Ion-isotopic exchange, Tracer isotopes, Specific reaction rate, Radioactivity

The radioactive isotopes ¹³¹I and ⁸²Br were used to trace the ion-isotopic exchange reactions using industrial grade ion exchange resins Amberlite IRA-400. The experiments were performed to understand the effect of temperature and concentration of ionic solution on kinetics of exchange reactions. Both the exchange reactions were greatly influenced by rise in temperature, which result in higher percentage of ions exchanged. For bromide ion-isotopic exchange reactions, the calculated values of specific reaction rate/min^-1, and amount of ions exchanged/mmol were obtained higher than that for iodide ion-isotopic exchange reactions under identical experimental conditions. The observed variation in the results for two ion-isotopic exchange reactions was due to the difference in the ionic size of bromide and iodide ions.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 95, 03/2007
Pages: 173 - 176

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