ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 27, Number 3
JKCSEZ 27(3)
June 20, 1983 

The conductances of sodium, potassium, ammonium, tetramethylammonium, and tetraethylammonium iodides, picrates(Pic) of sodium and potassium, and tetrabutylammonium tetraphenyl-boride have been measured in ethylene carbonate-acetone mixtures at 25℃. The limiting equivalent conductances of the electolytes were computed by Fuoss-Kraus equation and the order was (C4H9)4NB(ph)4 < NaPic < HPic < NaI < KI < NH4I(C2H5)4NI < (CH3)4NI at any composition of the mixtures. The dissociation constants of the salts showed that the mixtures are good ionizing solvents for the salts. The order of limiting ionic equivalent conductance, Na+ < K+ < NH4+, is consistent with exactly the reverse order found for solvation number. Effective solvated radii calibrated by the Nightingale method showed that picrate ion seems to be unsolvated and that iodide ion seems to be solvated to some extent in the mixtures.