Acidity functions of aqueous fluorinated acid solutions by differential pulse polarography |
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| Authors: | Robin A. Cox Ulrich J. Krull Michael Thompson Keith Yates |
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| Affiliation: | Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario M5S lA1 Canada |
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| Abstract: | The acidity functions of aqueous trifluoroacetic and trifluoromethanesulphonic acid mixtures, and aqueous hexafluoropropane-2, 2-diol solutions, have been determined by differential pulse polarography. The apparent shift of the half-wave potential for the ferrocene—ferricinium couple, as the solvent composition is changed, is used to indicate the change in potential of a glass electrode; acidity is measured as the HGF acidity function. The densities of two of these solvent systems as a function of composition are also reported. Trifluoromethanesulphonic acid—water mixtures represent the strongest aqueous acid solvent system so far studied. |
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