THE CONDUCTANCE OF SOLUTIONS-VISCOSITIES 



117 



to the viscosity change of the solution at higher concentrations. As we 

 have seen, the fluidity passes through a maximum, after which it de- 

 creases sharply. If the values of the conductance as calculated from 



jji 



Equation 9a are multiplied by the fluidity ratio =-, then these calculated 

 values fall upon a curve (B) exhibiting a slight maximum and minimum, 



g 60 



a 



r 

 i 



\ \ 



1.30 



Log (Concentration). 



FIG. 18. Showing the Influence of Fluidity Change on the Conductance Curve of 



KI in Water at 0. 



which practically coincides with the curve of measured conductances, as 

 may be seen from Figure 18. It is apparent that in the case of solu- 

 tions of potassium iodide in water and, in fact, this has been shown 

 to be true for aqueous solutions of all electrolytes exhibiting a negative 

 viscosity effect the speed of the ions changes in direct proportion to the 

 fluidity change of the solution. The peculiar form of the conductance 

 curve, as we have it in solutions of the potassium iodide, is due to the 

 variation of the viscosity effect. 



