236 PROPERTIES OF ELECTRICALLY CONDUCTING SYSTEMS 



Barium Chloride, BaCl 2 



5 2.847 0.924 



10 2.790 0.895 0.883 



20 2.730 0.865 0.850 



50 2.647 0.824 0.798 



100 2.585 0.793 0.759 



200 2.535 C.768 0.720 



Cobalt Chloride, CoCl 2 



5 2.858 0.929 



10 2.802 0.901 



20 2.749 0.875 



50 2.687 0.844 



Lanthanum Nitrate, La(N0 3 ) z 



5 3.694 0.898 



10 3.578 0.859 0.802 



20 3.440 0.813 



50 3.261 0.754 0.701 



100 3.149 0.716 



200 3.063 0.688 



500 3.002 0.667 



The agreement between the ionization values as determined from 

 conductance and freezing point measurements, in the case of the salts of 

 higher type, is not as close as in that of the binary salts. The devia- 

 tions in the more dilute solutions are in the neighborhood of one per cent, 

 for the uni-divalent salts. In solutions of potassium sulphate the ioniza- 

 tion values by the freezing point method are slightly higher than those 

 by the conductance method, except at a concentration of 0.2 normal, 

 where the conductance method gives a slightly higher value. On the 

 whole, for this salt the agreement is fairly close and it is possible that 

 the discrepancies which remain may be due to error in the value of A 

 employed. In the case of barium chloride, the ionization values by the 

 freezing point method at the lower concentrations are slightly over one 

 per cent higher than those by the conductance method. At the higher 

 concentration the difference in the values increases to five per cent at 

 0.2 normal. The differences at the lower concentrations may arise from 

 uncertainties in the values of A , but at the higher concentrations there 

 is evidently a definite divergence between the two curves. Accurate con- 

 ductance values for cobalt chloride are not available. The values of i, 

 however, do not differ greatly from those of barium chloride or potassium 

 sulphate. 



In solutions of lanthanum nitrate, the ionization values as deter- 



