Comprehensive Study of the Hydration and Dehydration Reactions of Carbon Dioxide in Aqueous Solution

The reversible interactions of dissolved CO2 with H2O and OH− to form H2CO3 and HCO3 − in aqueous solution have been investigated using spectrophotometric stopped-flow measurements. The progress of the reactions was monitored via indicators coupled to the pH changes during the reactions. The study,...

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Published inThe journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 114; no. 4; pp. 1734 - 1740
Main Authors Wang, Xiaoguang, Conway, William, Burns, Robert, McCann, Nichola, Maeder, Marcel
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 04.02.2010
Subjects
A: Kinetics, Spectroscopy
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Summary:The reversible interactions of dissolved CO2 with H2O and OH− to form H2CO3 and HCO3 − in aqueous solution have been investigated using spectrophotometric stopped-flow measurements. The progress of the reactions was monitored via indicators coupled to the pH changes during the reactions. The study, involving global analysis of the complete data set, spanned the temperature range 6.6−42.8 °C and resulted in the evaluation of all rate and equilibrium constants as well as activation parameters for the kinetic data and the reaction enthalpies and entropies for the equilibrium constants.
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ISSN:1089-5639
1520-5215
DOI:10.1021/jp909019u