Issue 0, 1967

Solvation and salt effects in the reaction of hydrogen peroxide with iodide ion at high iodide concentrations

Abstract

The first-order decomposition of hydrogen peroxide in neutral aqueous solution has been studied by a simple thermal technique in solutions containing high concentrations of several iodides. The derived second-order constants for the primary formation of Ol– are similar to those obtained at the same cation concentrations in the presence of other salts but under much slower reaction rate conditions (Iow I– concentration). No new kinetic feature therefore appears at the faster rates and the marked salt effect with alkali and alkaline-earth metals is principally attributable to the cation. The explanation that acceleration is due to the incorporation of H2O2 into the cation solvation sheath is supported by the observation that molal-BaCl2 has no detectable effect upon the relative activities of H2O and H2O2, as indicated by vapour analyses. Substituted ammonium ions, NH4+ itself, and Cd2+ all slow the reaction.

Article information

Article type
Paper

J. Chem. Soc. A, 1967, 1564-1566

Solvation and salt effects in the reaction of hydrogen peroxide with iodide ion at high iodide concentrations

B. Surfleet and P. A. H. Wyatt, J. Chem. Soc. A, 1967, 1564 DOI: 10.1039/J19670001564

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