ELECTROLYTES IN MIXED SOLVENTS 



189 



the two components. When the two components have nearly the same 

 fluidity, the fluidity curve exhibits a slight minimum. 



It is apparent that the fluidities of mixtures in general differ con- 

 siderably from those of the pure components and it is to be expected that 

 the conductance of solutions in such mixtures will be materially affected 

 by the viscosity change of the solvent. In those cases in which the elec- 



SO 



7S 



/CO 



B 



FIG. 43. Fluidity of Various Mixtures at 25. 



trolyte is largely ionized, it is to be expected that the conductance of a 

 solution in a mixture of two solvents will vary approximately in accord- 

 ance with the fluidity of the mixture. At higher concentrations a similar 

 correspondence between the conductance and the fluidity is to be expected 

 when the ionization of the electrolyte is the same in the two solvents. In 

 general, this will be the case when we have solvents which have the same 

 dielectric constant, and an electrolyte which does not exhibit a marked 

 tendency to form solvates. In other cases, when the ionization is 



