Resumen de A kinetic-equilibrium study of a triiodide concentration maximum formed by the persulfate-iodide reaction
Arthur E. Burgess, John C. Davidson
The presence of triiodide, I3-, throughout the lifetime of a persulfate-iodide reaction with persulfate in excess, is controlled by an opposing effect of falling iodide concentration and rising iodine concentration. This brings triiodide to a concentration maximum, [I3-]max, which can be studied by UV-visible spectroscopy using absorbance measurements taken over an extended iodine clock time-scan. Equilibrium and conservation equations can be combined so that, together with [I3-]max, a value of the constant K for the equilibrium established between iodine, iodide, and the triiodide complex ion can be obtained.
