The Mechanism of Decomposition of Hydrogen Peroxide by Iodine in Acid Solutions. The Rates of Associated Reactions
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概要
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For the purpose of isolating elementary reactions responsible for the decomposition of hydrogen peroxide by iodine and its compounds, the reaction at 50°C of acid solutions containing I<SUB>2</SUB>, I<SUP>−</SUP>, HIO, <I>etc.</I> with [I<SUP>−</SUP>] and [I<SUB>2</SUB>] controlled by use of TlI(s) and I<SUB>2</SUB>(s) was studied. The rates of the evolution of oxygen, consumption of hydrogen peroxide and production of H<SUP>+</SUP> were subjected to measurement and led to a formulation of a complex mechanism consisting of the following reactions: HIO<SUB>2</SUB>+H<SUB>2</SUB>O<SUB>2</SUB>→HIO+H<SUB>2</SUB>O+O<SUB>2</SUB>; H<SUB>2</SUB>OI<SUP>+</SUP>+H<SUB>2</SUB>O<SUB>2</SUB>→HIO<SUB>2</SUB>+H<SUP>+</SUP>+H<SUB>2</SUB>O; HIO+H<SUB>2</SUB>O<SUB>2</SUB>→H<SUP>+</SUP>+I<SUP>−</SUP>+H<SUB>2</SUB>O+O<SUB>2</SUB>; HIO<SUB>2</SUB>+H<SUP>+</SUP>+I<SUP>−</SUP>→2HIO; H<SUB>2</SUB>OI<SUP>+</SUP>\rightleftharpoonsHIO+H<SUP>+</SUP>; I<SUP>−</SUP>+H<SUP>+</SUP>+H<SUB>2</SUB>O<SUB>2</SUB>→HIO+H<SUB>2</SUB>O; and I<SUB>2</SUB>+H<SUB>2</SUB>O\rightleftharpoonsHIO+H<SUP>+</SUP>+I<SUP>−</SUP>. Absolute or relative rate constants for the first four reactions were evaluated by using equilibrium and rate constants of the others.
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著者
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Simic Radmilo
Department of Chemistry, Texas A &M University
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Liebhafsky Herman
Department of Chemistry, Texas A & M University, College Station
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Matsuzaki Isao
Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
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Matsuzaki Isao
Department of Chemistry, Texas A &M University
関連論文
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