Abstract
Summary The glass electrode was found to follow the Nernst relation in sulfolane when junction potentials are accounted for, and was used to determine the basicity of some amines in sulfolane. Using extrathermodynamic assumptions, the amine basicities appeared different from those in water mostly because of the large values of the solvent activity coefficient of the neutral amines. Values obtained with the glass electrode in acidic media (HCl, HBr, HClO4, HSbCl6) are in agreement with results reported using other methods (H0, conductivity). The pH of 1 M strong acid in sulfolane is estimated to be ≈−12 from potential measurements of the hydrogen electrode in HClO4 solutions.
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