Pulse radiolysis of aqueous solutions. Rate of reaction of OH with OH–

Abstract

The results of competition studies of the reactions of hydroxyl radicals with carbonate ion and ethanol or methanol at high concentration in nitrous-oxide- and oxygen-saturated solution at pH 11 are consistent with O^– being a product of the reaction of e^–_aq with N₂O, and with the equilibrium (1), OH+OH^–⇌ O^–+H₂O, (1) not being established. On this basis, rate constants for the forward and reverse reactions of this equilibrium have been determined. The values obtained are k₁=(1.2±0.3)× 10¹⁰ M^–1 s^–1 and k_–1=(9.2±2.0)× 10⁷ s^–1.