Conductivity of Organic Acids in Ethyl Alcohol. 



141 



become greater with rise in temperature. This would explain the 

 greater temperature coefficients of conductivity of alcoholic solutions. 

 The increase in conductivity with rise in temperature can be seen 

 from figures 13 and 14. The curves have very much the appearance 

 of those for aqueous solutions. This suggests the thought that perhaps 

 the increase in molecular conductivity in alcohol with rise in tempera- 

 ture is, as in aqueous solutions, a parabolic function, and that the 

 Euler equation, 



applies to both. This will be tested in later work by determining the 

 conductivities of some of the acids at temperatures other than 15, 25, 

 and 35, and comparing the results obtained with those calculated 

 from the above equation. 



.30 

 .Z8 

 .26 

 .24 

 .22 



.20 



>. 



^ -'8 



u 



i 16 



o 



D 

 O .12 



0) 



.08 

 .06 

 .04 

 .02 



BENZOIC ACID 



MALEIC ACID 



7 



z.o 



1.6 



1.2 



o 



c 

 o 

 u 



O 0.8 

 (U 



0.4 





L 



L 



I 2 



Log volume 

 FIG. 15. 



olume 



FIG. 16. 



The effect of increase in dilution is to increase the molecular con- 

 ductivity. The increase in conductivity in many cases is almost pro- 

 portional to the volume. This relation is shown graphically in figures 

 15 and 16. 



A knowledge of the extent to which organic acids are dissociated hi 

 alcoholic solution would be highly desirable. It is hoped that a method 



