Kinetics and mechanism of the catalysed decomposition of sodium perborate by the ethylenediaminetetraacetatoiron(III) complex |
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Authors: | Anis Samy S. |
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Affiliation: | (1) Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt |
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Abstract: | The rate of reaction of [FeIIIY] (Y = EDTA anion) with NaBO3 was studied in aqueous 0.1 M NaNO3 at various temperatures. The observed rate constant,kobs = kKKK1[FeEDTA(H2O)-]/{[H+] + KK1[FeEDTA(H2O)-]}applies over the pH range studied. The monohydroxy complex, [FeEDTA (OH)]2– is the catalyst which reacts with the peroxy ion to produce a violet intermediate complex. The composition of perborate confirms to Michaelis–Menten kinetics, the rate-determining step involving breakdown of the intermediate complex. The activation enthalpy and activation entropy were calculated. |
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