Abstract
A study of the two simultaneous equilibria, reactions (1) and (2), has been performed by pulse radiolysis in Ar-saturated aqueous solution at 25°C. The forward and reverse rate constants of equilibrium (2) were determined at 0.3 mol dm-3 ionic strength to be k2=(6.1±0.2)×108 and k-2=(2.1±0.1)×108 d mol-1 s-1. These yield the equilibrium constant K2=k2/k-2=(2.9±0.2) at 0.3 mol dm-3 ionic strength, or 1.2 corrected to zero ionic strength. As part of the study, the reactions of SO4- with S2O82-, t-BuOH and water were found to be <1.5×103, (7.8±0.2)×105 d mol-1 s-1 and (690±120) s-1, respectively. The relevance of these results to cloud chemistry is discussed.
Published Version
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