CBSE 2025 · Region 5 · Set 1 · Q18 · 2 marks

Concentration of KCl solution in $\displaystyle \mathrm{mol} / L$ Conductivity at $\displaystyle 298 \cdot 15 K$ in $\displaystyle S c m^{-1}$ Molar Conductivity at $\displaystyle 298 \cdot 15 K$ in $\displaystyle S \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
$\displaystyle 1.000$ $\displaystyle 0 \cdot 1113$ $\displaystyle 111 \cdot 3$
$\displaystyle 0.100$ $\displaystyle 0.0129$ $\displaystyle 129 \cdot 0$
$\displaystyle 0.010$ $\displaystyle 0.00141$ $\displaystyle 141 \cdot 0$
Based on the data given above, give plausible reason for the variation of conductivity and molar conductivity with concentration.

ElectrochemistryConductance of Electrolytic SolutionsUnderstandvery_short_answermedium

Marking-scheme solution

Concentration of KCl solution in $\displaystyle \mathrm{mol} / L$	Conductivity at $\displaystyle 298 \cdot 15 K$ in $\displaystyle S c m^{-1}$	Molar Conductivity at $\displaystyle 298 \cdot 15 K$ in $\displaystyle S \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
$\displaystyle 1.000$	$\displaystyle 0 \cdot 1113$	$\displaystyle 111 \cdot 3$
$\displaystyle 0.100$	$\displaystyle 0.0129$	$\displaystyle 129 \cdot 0$
$\displaystyle 0.010$	$\displaystyle 0.00141$	$\displaystyle 141 \cdot 0$