Abstract
The cation- and anion-constituent transference numbers of aqueous 0.02M potassium picrate have been measured at 25°C by the moving-boundary method. The large difference (0.014) between the results and the predictions of the Debye-Hückel-Onsager theory, and similar anomalies in the literature, are consistent with the existence of picrate ion dimers (Pi 2−2 ) with a formation constant of 4(±2) liter-mole−1.
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This work was carried out at Imperial College while P. G. N. Moseley was on leave of absence from the University of Khartoum.
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Moseley, P.G.N., Spiro, M. Transference numbers of potassium picrate in water at 25°C and the dimerization of picrate ions. J Solution Chem 1, 39–43 (1972). https://doi.org/10.1007/BF00648415
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DOI: https://doi.org/10.1007/BF00648415