A study of fast reactions of trilon B with colored complexes formed by Xylenol orange with rare earth elements of the cerium subgroup

The stopped-flow method has been used to study the reaction of Trilon B with the colored complexes formed by Xylenol Orange with the rare earth elements of the cerium subgroup. It has been shown that the limiting stage in this reaction is the stage involving dissociation of the colored complex. The rate constants and energy and entropy of activation of the dissociation of the complexes formed by the rare earth elements of the cerium subgroup with Xylenol Orange have been determined.