ELECTROLYTIC CONDUCTANCE AND IONIC ASSOCIATION OF SEVERAL SALTS IN ETHANOL-WATER MIXTURES

The electrolytic conductance of lithium chloride, potassium picrate (KPi), potassium tetraphenylborate (KBPh4), triisoamyl-n-butylammonium picrate (TABPi), and triisoamyl-n-butylammonium tetraphenylborate (TAB BPh4) was measured at 25°C. over the range of ethanol-water mixtures where ion-pair association was expected. Limiting equivalent conductances and ion-pair association constants for the electrolytes were derived using either the Fuoss-Onsager theory or the Shedlovsky function. Limiting equivalent conductances for the single ions were calculated on the basis of the Coplan-Fuoss assumption. Ion-size parameters are reported for the solutions analyzed by the Fuoss-Onsager theory. © 1969, American Chemical Society. All rights reserved.