H. Weingartner et al., TRANSPORT MEASUREMENTS IN AQUEOUS SODIUM-SULFATE - EVIDENCE FOR LIKE-ION PAIRS IN CONCENTRATED-SOLUTIONS, Journal of physical chemistry, 97(23), 1993, pp. 6289-6291
Precise self-diffusion and conductance data are reported for aqueous s
olutions of sodium sulfate at 25-degrees-C in the general concentratio
n range 0.1 mol dm-3 to saturation. These data in conjunction with mut
ual diffusion, transference, and activity coefficient data enable the
calculation of velocity correlation coefficients, f(ab), and closely r
elated transport coefficients, which may serve as sensitive probes for
ion configurations in solution. Evidence is found for like-ion pairs
at concentrations above 0.1 mol dm-3.