ELECTROLYTES IN MIXED SOLVENTS 191 



TABLE LXXVI. 



CONDUCTANCE OF TETRAETHYLAMMONIUM IODIDE IN MIXED SOLVENTS 

 AT 25 AT A DILUTION OF 800 LITERS. 



Solvent Per Cent B 



methyl alcohols, a pronounced minimum is found in both conductance 

 curves. Finally, in mixtures of nitrobenzol and ethyl alcohol, the con- 

 ductance curve exhibits a slight maximum corresponding with the maxi- 

 mum in the fluidity curve. In general, salts which show little tendency 

 to form stable complexes with water, in other words, those salts which 

 exhibit a negative viscosity in aqueous solutions, yield conductance 

 curves closely resembling those for tetraethylammonium iodide. It may 

 be noted, however, that the conductance for tetraethylammonium iodide 

 in methyl alcohol is abnormally high, being in fact somewhat greater 

 than that of the same salt in water. In general, the conductance of salts 

 in methyl alcohol is somewhat lower than that of salts in water, even 

 though the viscosity of water is greater than that of methyl alcohol. The 

 curves for solutions of other binary salts do not differ materially from 

 those of tetraethylammonium iodide. In the case of electrolytes of this 

 type, the ionization in a given solvent is near the maximum and is not 

 appreciably affected by the addition of a small amount of another solvent. 

 Moreover, the ionization of typical salts in these solvents does not differ 

 greatly at concentrations approaching 10~ 3 normal. The form of the 

 conductance curves, therefore, is determined primarily by the fluidity 

 of the solvent mixtures. 



TABLE LXXVII. 



CONDUCTANCE OF SOLUTIONS OF POTASSIUM IODIDE IN MIXTURES OF 

 ACETONE WITH METHYL AND ETHYL ALCOHOLS AND WATER AT 0. 



Per Cent Acetone 25 50 75 100 



H 2 78.0 47.8 37.5 44.1 120.01 



CH 3 OH 71.7 83.9 94.1 106.5 120.0^7 = 1600 



C 2 H 5 OH 28.6 40.1 61.3 84.8 120.0J 



H 2 76.7 44.6 36.3 41.6 100.41 



CH 3 OH 65.7 74.1 82.7 93.1 100.417 = 



C 2 H 5 OH 22.0 35.5 52.2 72.0 100.4J 



