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  4. The correct order of equivalent conductance at infinite dilution of LiCl, NaCl and KCl is

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Q. The correct order of equivalent conductance at infinite dilution of $LiCl, NaCl $ and $KCl $ is

IIT JEEIIT JEE 2001Electrochemistry

Solution:

In $LiCl , NaCl$ and $KCl$, anions are same.
Cations have same charge but different size. Smaller cations are more heavily hydrated in aqueous solution giving larger hydrated radius and thus smaller ionic speeds and equivalent conductance.
$\Rightarrow$ Equivalent conductance : $KCl > NaCl > LiCl$