A kinetics of hydrolysis of ring phosphorus oxoanion in ion exchanger phase |
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Authors: | Toshio Nakashima Gohsuke Sugihara Michitaka Urushima Hirohiko Waki |
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Institution: | (1) Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonanku, 814-01 Fukuoka, Japan;(2) Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Higashiku, 812 Fukuoka, Japan |
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Abstract: | Ring phosphorus oxoanion, hexapotassium dodecaoxohexaphosphate(III), (DOHP), was hydrolyzed in anion exchangers in order to elucidate the physicochemical state in the solid phase. The hydrolysis of DOHP obeys pseudo first order kinetics as is the case in aqueous solution. The hydrolysis rate constants k were determined as a function of the external solution pH or proton concentration in an anion exchanger. It was estimated from the Donnan equation and from the spectral change of an acid base indicator in the anion exchanger. The difference in k in aqueous and in the anion exchanger phase is discussed. |
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Keywords: | Kinetics hydrolysis anion exchanger ring phosphorus oxoanion |
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