CONDUCTIVITY AND VISCOSITY IN MIXED SOLVENTS. 



incorporated with theirs. This has been done in table 30. The degree of 

 dissociation has been calculated for each dilution. Included in the table, 

 for comparison, are similar values calculated from data obtained by Ostwald 

 for potassium iodide in water, and from data given by Carrara for potassium 

 iodide in methyl alcohol. 



TABLE 30. Conductivity and dissociation of potassium iodide in water, methyl alcohol, 



and 50 per cent methyl alcohol. 



The values of the dissociation factors are shown in table 30. From an 

 inspection of the data, it is seen that a limiting value for conductivity is 

 reached at a lower dilution in the mixture than in the other solvents. 



An inspection of this table shows that, at corresponding dilutions, dissocia- 

 tion as calculated from conductivity is greater in the mixture than in methyl 

 alcohol or in water. The only other solvent thus far shown to have a greater 

 dissociating power than water is liquid hydrocyanic acid, as appears from the 

 work of Centnerszwer. Potassium iodide was one of the substances used. 



SODIUM IODIDE. 



The sodium iodide was the preparation previously employed, 

 panying measurements were made: 



The accom- 



Combining these with the values previously obtained, and using Carrara's 

 values for conductivities in water and methyl alcohol, respectively, we have 

 the values given in table 31. 



