Question
Explain about the variation of molar conductivity with concentration by Kohiraush studies?
✓
Answer
Kohiraush observed that, increase of molar conductance of an electrolytic solution with the increase in dilution. He deduced the following empirical relationship between the molar conductance $\left(\Lambda_{ m }\right)$ and concentration of the
$
\Lambda_{ m }=\Lambda_{ m }^0- k \sqrt{ c }
$
For strong electrolytes such as $KCl , NaCl$ the plot $\Lambda_{ m } V _s \sqrt{c}$, gives a straight line. It is also observed that the plot is not a linear one for weak electrolyte.
$
\Lambda_{ m }=\Lambda_{ m }^0- k \sqrt{ c }
$
For strong electrolytes such as $KCl , NaCl$ the plot $\Lambda_{ m } V _s \sqrt{c}$, gives a straight line. It is also observed that the plot is not a linear one for weak electrolyte.
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