If the molar conductivity (\Lambdam) of a 0.050\ \mathrm{mol\,L^{-1}} solution of a monobasic weak acid is 90\ \mathrm{S\,cm^2\,mol^{-1}}, its extent (degree) of dissociation will be [assume \lambda^\

Question

If the molar conductivity (\Lambdam) of a 0.050\ \mathrm{mol\,L^{-1}} solution of a monobasic weak acid is 90\ \mathrm{S\,cm^2\,mol^{-1}}, its extent (degree) of dissociation will be [assume \lambda^\circ{+} = 349.6\ \mathrm{S\,cm^2\,mol^{-1}} and \lambda^\circ{-} = 50.4\ \mathrm{S\,cm^2\,mol^{-1}}]:

Vishal Gupta · Accepted Answer

C. \Lambdam^\circ = 349.6 + 50.4 = 400\ \mathrm{S\,cm^2\,mol^{-1}}. Degree of dissociation \alpha = \frac{\Lambdam}{\Lambdam^\circ} = \frac{90}{400} = 0.225.

Electrochemistry

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