70 PROPERTIES OF ELECTRICALLY CONDUCTING SYSTEMS 



the value 301 and for K the value 1.26 X 10' 4 . 5 That is, the straight 

 line drawn corresponding to this slope passes through the points in the 

 more dilute solutions. 



o 



0.0 



2.5 5.0 7.5 10 12.5 15 



100 (CA). 

 FIG. 8. A K Plot for KNH 2 in NH 3 . 



17-5 



Having determined the preliminary values of K and of A , we may 

 plot the values of the logarithm of K' K against the logarithm of Cy. 

 The plot for this function is shown in Figure 9, where it will be observed 



Log tar) 



FIG. 9. M D Plot lor KNH 2 in NH 3 . 



that the points lie upon a straight line well within the limits of experi- 

 mental error. This plot yields a value of D = 0.095 and ra = 1.18. 

 Finally, in order to obtain a more precise value of K, values of K.' are 



Kraus and Bray, loc. cit. 



