Abstract
Trifluoromethanesulfonic acid ionizes as a weak acid in anyhdrous sulfuric acid. Conductance measurements and conductimetric titrations with the base potassium hydrogensulfate, lead to a Ka value of 8 × 10−4 mol kg−1 at 25 °C. Trifluoromethanesulfonic acid is thus a weaker acid in this solvent than is fluorosulfuric acid and is similar in strength to chlorosulfuric acid.
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