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Kinetics of the disproportionation reaction of HIO 2 in acidic aqueous solutions
Author(s) -
Marković Smiljana,
Petrović Biljana
Publication year - 2010
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/kin.20516
Subject(s) - disproportionation , chemistry , enthalpy , gibbs free energy , aqueous solution , kinetic energy , reaction rate constant , activation energy , sulfuric acid , thermodynamics , entropy of activation , kinetics , reaction rate , inorganic chemistry , catalysis , organic chemistry , physics , quantum mechanics
We review and discuss kinetic studies of the disproportionation reaction of iodous acid (HIO 2 ) in the presence of excess of Hg 2+ ‐ions. The reactions are followed at different temperatures in water solution with strongly defined acidity. The rate constants of disproportionation are determined between 285 and 303 K based on kinetic data obtained under steady‐state conditions. The calculated rate constants increase with increasing temperature and acid concentration. The corresponding values of activation energy as well as enthalpy and entropy of activation for this reaction have been calculated. The enthalpy of activation as well as entropy is higher at higher sulfuric acid concentration. Also, it was considered that the values of Gibbs energy of formation of HgI + are generated during the process. © 2010 Wiley Periodicals, Inc. Int J Chem Kinet 42: 687–691, 2010