Abstract
Transference numbers in aqueous solutions of NaCl and Na 2 SO 4 were obtained by measuring the emf of cells with liquid junction using sodium-selective glass electrodes. Transference numbers in the NaCl−H2O system from about 0.1 to 4 mol-kg−1 (m) are in good agreement with literature data obtained by various experimental techniques, but are markedly lower than recent data obtained from emf measurements with Ag,AgCl-electrodes. Transference numbers in the Na 2 SO 4 −H 2 O system from about 0.03 to 1.9 m show a small decrease with increasing salt concentration, which is near the limit of experimental uncertainty. Sodium-selective electrodes are well suited to perform determinations of transference numbers and may provide an alternative to amalgam electrodes.
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Braun, B.M., Weingärtner, H. Transference numbers of aqueous NaCl and Na2SO4 at 25°C from EMF measurements with sodium-selective glass electrodes. J Solution Chem 14, 675–686 (1985). https://doi.org/10.1007/BF00646059
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DOI: https://doi.org/10.1007/BF00646059