Question

The resistance of 1 N solution of acetic acid is 250 Ohm, when measured in a cell of cell constant $1.15cm^{- 1}.$ The equivalent conductance (in $Ohm^{- 1}cm^{2}equiv^{- 1}$) of 1 N acetic acid is.

• A. 4.6
• B. 9.2
• C. 18.4
• D. 0.023

Answer 1

Answer: (A)

4.6

Answer 2

$\kappa = G \times \text{cellconstant}$ $= \frac{\text{Cell constant}}{R} = \frac{1.15}{250}$

$\Lambda_{eq} = \frac{\kappa \times 1000}{\text{Normality}} = \frac{1.15}{250} \times \frac{1000}{1}$ $= 4.6\Omega^{- 1}cm^{2}eq^{- 1}.$