Abstract
Dependences of La(III) overall ion mobilities ū on concentrations of ox2− and tart2− anions of oxalic and tartaric acid in aqueous solutions of 0.01 overall ionic strength and temperature 298.1 K were obtained by direct measurements of electromigration of carrierfree140La-lanthanum(III). Concentration stability constants Kn and individual ion mobilities u oi of oxalate and tartrate complexes of La(III) have been calculated for nitrate and perchlorate electrolytes, respectively: [La(ox)]+, lg K1=5.63(9), u0[La(ox)]+=1.95(15)·10−4 cm2·s−1·V−1; [la(ox)2]−, lg K2=4.05(19) u0[La(ox)2]−=−1.76(20)·10−4 cm2·s−1·V−1; [La(tart)]+, lg K1=4.40(5), u0[La(tart)]+=+1.99(18)·10−4 cm2·s−1·V−1.
Results are compared with literature data. Additional, limiting individual La3+ ion mobility was calculated:\(u_{La^{3 + } }^{\mu = 0}\) =+6.9(1)·10−4 cm2·s−1·V−1 for pure water at 298.1 K.
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Rösch, F., Herrmann, R., Hung, T.K. et al. Electromigration of carrier-free radionuclides. Journal of Radioanalytical and Nuclear Chemistry, Articles 111, 319–327 (1987). https://doi.org/10.1007/BF02072865
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DOI: https://doi.org/10.1007/BF02072865