How does the cation radius affect the rate of increase of the electrical conductivity of a salt in aqueous solution?

Potassium chloride has a greater ionic radius than sodium chloride. How does this affect the fall in rate of increase in conductivity as concentration concentrations? I know the following factors affect the plateauing of the curve:


lesser dissociation, the equilibrium is disturbed as a result of lack of water molecules to fully solvate the ions, ionic pair association and the increased visocity of the solution


In my experiment I found that the decraase of the rate of increase was greater for KCl, which I found weird.


