Stokes-Walden behavior

The results of an investigation performed upon various salts in PC [207] or MeOH [15] can be summarized as follows. Both the maximum conductivity and the appertaining concentration 41 are determined by the viscosity and ionic radii (nonsolvated ions) or Stokes radii (solvated ions), meaning that electrolytes show a Stokes-Walden behavior, entailing... 

Many recent examples show the importance of ionic radii and solvation for the conductivity of concentrated solutions. Suffice it to refer three examples from the literature. Binary mixtures of dipolar aprotic solvents of sufficiently high permittivity such as butylene carbonate (BC),PC,EC, and AN show Stokes-Walden behavior [412, 413]. For Bu4NBr in AN/PC in the temperature range 75°C > > —35 °C a linear correlation /Cmax(At) is found [413], independent of temperature and solvent composition. The use of high-permittivity solvents belonging to the same class suppresses the effects due to strong selective solvation or effects due to changing association. 

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