Kinetics of the bromate–iodide reaction: catalysis by Molybdate

Abstract

The reaction between bromate and iodide ions in aqueous solution at pH 2–3 is catalysed by Mo^VI and follows the kinetic law v=–d[BrO₃^–]/dt=k₀[H⁺]²[l^–][BrO₃^–]+k′[H⁺][l^–][BrO₃^–][Mo^VI]. At 25° and ionic strength 1·00 mol l^–1, k₀= 50 l³ mol^–3 s^–1 and k′= 3·4 × 10⁴ l³ mol^–3 s^–1. The catalysis is attributed to the formation of a complex between Br^V and Mo^VI.