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Standard XII

Chemistry

Conductance of Electrolytic Solution

Equivalent co...

Question

Equivalent conductance of $1$ M $C H_{3} C O O H$ is $10$ $o h m^{- 1}$ $c m^{2}$ $e q u i^{- 1}$ and that at infinite dilution is $200$ $o h m^{- 1}$ $c m^{2}$ $e q u i v^{- 1}$ . Hence the $%$ ionization of $C H_{3} C O O H$ is:

5 %

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2 %

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4 %

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1 %

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Solution

The correct option is A $5 %$
Degree of ionization can be defined as a ratio of equivalent conductance at concentration c to the equivalent conductance at infinite dilution. It can be given as follows:
$α = \frac{λ_{c}}{λ_{\infty}}$
$λ_{c}$ is given as 10 $o h m^{- 1} c m^{2} e q u i^{- 1}$
$λ_{\infty}$ is given as 200 $o h m^{- 1} c m^{2} e q u i^{- 1}$
So, $α = \frac{10}{200} = 0.05$
% ionization = $α \times 100 = 0.05 \times 100 = 5$ %

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Similar questions

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Equivalent conductance of 1M CH3COOH is 10 ohm−1 cm2 equi−1 and that at infinite dilution is 200 ohm−1 cm2 equiv−1. Hence the % ionization of CH3COOH is:

Equivalent conductance of $1$ M $C H_{3} C O O H$ is $10$ $o h m^{- 1}$ $c m^{2}$ $e q u i^{- 1}$ and that at infinite dilution is $200$ $o h m^{- 1}$ $c m^{2}$ $e q u i v^{- 1}$ . Hence the $%$ ionization of $C H_{3} C O O H$ is: