Acidity constant of hydrofluoric acid |
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| Authors: | G. T. Hefter |
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| Affiliation: | (1) Chemistry Department, University of Malaya, 22-11 Kuala Lumpur, Malaysia;(2) Present address: School of Mathematical & Physical Sciences, Murdoch University, 6150 Murdoch, W.A., Australia |
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| Abstract: | A detailed experimental investigation of the association (acidity) constant of hydrofluoric acid has been made at 25°C in sodium perchlorate media at ionic strengths between 0.01 and 0.5M. Results were obtained by potentiometry using a fluoride ion-selective electrode in conjunction with three types of reference electrode, all involving cells with liquid junction. After careful consideration of possible errors in the present results and a critical study of the literature, a zero ionic strength pKao (HF) value of 3.18±0.02 is recommended until existing contradictions can be resolved. |
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| Keywords: | Hydrogen fluoride hydrofluoric acid stability constant acidity constant fluoride ion-selective electrode |
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