Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Kinetics of Oxygen Exchange between Arsenate Ions and Water. II. Catalysis by Arsenious Acid
Akiko OkumuraNoriko YamamotoNobukazu Okazaki
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1973 Volume 46 Issue 12 Pages 3633-3635


Oxygen exchange between arsenate ions and water is catalyzed by arsenious acid. The catalytic effect has been studied at 14.5 °C and 30.0 °C over the pH region of 7.5–10.2. The increase in the exchange rate due to the addition of arsenious acid, Rc may be expressed as: Rck[H+][As(III)][As(V)]. The results are interpreted in terms of the rapid reversible condensation of the As(III) with the As(V) species to form the arsenitoarsenate ions.

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