OF SALTS IN ETHYL ALCOHOL AND WATER. 



91 



vestigators 1 and it is unnecessary to discuss it here in detail. It is 

 sufficient to state that the facts brought out in this investigation are 

 entirely in harmony with the theories established by previous workers. 



CONDUCTIVITY. 



The conductivity data given above were plotted in the form of curves; 

 ordinates representing conductivities and abscissas the percentages by 

 weight of alcohol. The conductivity of each concentration of the 

 solutions at the three temperatures were plotted on one curve sheet 

 in order the better to compare them. Before plotting these curves we 

 attempted to plot one which would give us the conductivity values 

 (plotting conductivity against normality) for the ordinary normalities 



150 



140 

 130 

 120 

 110 



100 



90 

 if 



I 80 

 I 



1" 



60 

 50 

 40 

 30 

 20 

 10 



10 20 30 40 50 60 70 80 90 100. 



Percentage alcohol 

 FIG. 37. N/8-KI. 



130 

 120 



no 

 100 



90 



80 



|70 



*J 



| 60 



cS 



50 

 40 

 30 

 20 

 10 

 



10 20 30 40 50 60 70 80 90 100 



Percentage alcohol 

 FIG. 38. N/8-NaI. 



N/8, N/32, etc., instead of for those given above. However, we found 

 this to be impracticable, both as to the drawing of the curves and also 

 as to the results we would have obtained; since, with reference to the 

 latter, the slight change in conductivity that would result would not 

 be sufficient to alter, to any appreciable extent, the character of the 

 curves obtained by using the above values, although these values are 

 obviously not strictly comparable with one another. 



It will be seen from figures 37 and 38, which show the curves for 

 N/8 potassiu n and sodium iodides at 15, 25, and 35, that there is a 

 continual decrease in the conductivity of both salts in passing from 

 the pure water to the pure alcohol. 



Carnegie Inst. Wash. Pub. No. 80. 



