Acidobasic properties of molten potassium tetrahalogenogallates (X=Cl,I) |
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| Authors: | Ibra Gueye Dioum Jacques Vedel Bernard Tremillon |
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| Institution: | Laboratoire d''Electrochimie Analytique et Appliquée (associé au C.N.R.S., L.A. 216), Ecole Nationale Supérieure de Chimie de Paris, 11, rue Pierre et Marie Curie, 75005-Paris France |
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| Abstract: | Molten potassium tetrachlorogallate and potassium tetraiodogallate were studied in terms of halogenoacidity, based on X? ion-exchange. Titration of KX solution with GaX3 were achieved and characterized by the shift of cathodic voltammetric curves. Autodissociation constants Ki,X/mol2 kg?1 were determined: ?log Ki,Cl=4.25±0.05 and ?log Ki,I=2.6±0.05, as well as the solubility values of KX: 0.41±0.02 and 0.80±0.02 mol kg?1 for KCl and KI respectively. |
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