First slide

Conductivity , Molar conductivity and Equivalent Conductivity

Question

The resistance of 0.1 M solution of electrolyte was found to be 200 ohm at 298 K using a conductivity cell of cell constant 0.66 cm^-1. The molar conductance of this solution is

Moderate

A

330 S cm² moI^-1
B

33 S cm² moI^-1
C

3.33 S cm² moI^-1
D

0.33 S cm² moI^-1

Solution

$\begin{array}{l} Λ_{m} = \frac{k \times 1000}{M} k = \frac{G^{*}}{R} = \frac{Cell Constant}{Resistance} \\ Λ_{m} = \frac{0 .66 \times 1000}{200 \times 0 .1} = 33 S {cm}^{2} {mol}^{- 1} \end{array}$

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