Pd. Ceccattini et al., TRANSFERENCE NUMBERS OF NACL IN AQUEOUS MIXTURES WITH ORGANIC-SOLVENTS OF MODERATE TO LOW PERMITTIVITIES, Journal of solution chemistry, 27(1), 1998, pp. 1-16
Electromotive forces (emf) were measured in the transference cells: Ag
\AgCl\-NaCl (m(2)) in Z\\ NaCl (m(1)) in Z\AgCl\Ag and NaxHg1-x\NaCl (
m(1)) in Z\\ NaCl (m(2)) in Z\NaxHg1-x (where NaxHg1-x denotes a flowi
ng Na-amalgam electrode and Z an aqueous-organic solvent mixture) at v
arious molalities m(2) > m(1) of NaCl in Z = (ethylene glycol + water)
, (acetonitrile + water) and (1,4-dioxane + water), with mass fraction
s of the organic components less than or equal to 0.8. The transferenc
e number of Na+ in (ethylene glycol + water) and (1,4-dioxane + water)
varies little with respect to that in pure water medium, whereas in (
acetonitrile + water) it increases remarkably with increasing proporti
on of acetonitrile so as to approach equitransference, behavior simila
r to that previously found in (methanol + water) and in (ethanol + wat
er). At acetonitrile mass fraction 0.6 NaCl is sufficiently close to e
quitransference to emerge as a useful salt bridge, nearly at the same
level as the popular aqueous KCl.