WORK OF E. G. MAHIN. 



131 



The irregularity in the value of the product of maximum conductivity and vis- 

 cosity, in the case of acetone and methyl alcohol mixtures, is probably due to the 

 fact that complete dissociation was more nearly approached in some cases than in 

 others. The values for pure acetone and for pure methyl alcohol are, however, 

 nearly the same; and we may expect that the curves for maximum molecular con- 

 ductivity, when finally obtained, will be found to be nearly straight lines, similar 

 to the fluidity curves for the solvents. 



Table 101. ri.fx v for Cadmium Iodide in Mixed Solvents. 



Fig. 59. 



0.2 0.3 



Concentration Nomal 

 -Molecular weight of cadmium iodide in acetone. 



In the acetone and ethyl alcohol mixtures there is a fair degree of constancy in 

 the product, and the conductivity curve is nearly the theoretical one. The acetone 

 and water curve is also nearly the same as the fluidity curve for the solvents, and 

 the value of the product almost exactly follows the rule of mixtures, although here 

 again the exceptionally high value of the product for water is noticed, it being about 

 2.5 instead of 1.0, as in the case of lithium nitrate and tetraethylammonium iodide. 

 The reason for this interesting fact must, for the present, remain unexplained. 



