First slide

Conductivity , Molar conductivity and Equivalent Conductivity

Question

Resistance of 0.1 M KCl solution in a conductance cell is 300 ohm and conductivity is 0.013 Scm^-1. The value of cell constant is :

Moderate

A

3.9 cm^-1
B

39 cm^-1
C

3.9 m^-1
D

None of these

Solution

conductance $(G) = \frac{1}{R} \Rightarrow \frac{1}{300};$
$∵ κ = G (\frac{l}{A})$
Cell constant $(\frac{l}{A}) = \frac{0 .013}{1} \times 300 = 3 .9 {cm}^{- 1}$

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