Common basis for salt, micelle and microemulsion effects upon the ionic reaction of hexachloroiridate(IV) with thiosulfate

Abstract

The kinetics of the anion–anion reaction between thiosulfate and hexachloroiridate(IV) have been studied in anionic micellar (sodium dodecyl sulfate) and salt (sodium perchlorate) solutions at 298.2 K. The micellar and salt effects can be explained by taking as a starting point the Brønsted equation. This equation is also useful to explain kinetic results corresponding to the reaction Fe(CN)₄(bpy)^2–+ S₂O₈^2– in water-in-oil microemulsion systems.