Conductivity , Molar conductivity and Equivalent Conductivity

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Question

Molar conductance of 0.01M weak monoprotic acid is 45 ${mhocm}^{2} {mole}^{- 1}$ . Molar conductane of the same acid at infinite dilution is 450 ${mhocm}^{2} {mol}^{- 1} . p^{H}$ of the acid solution is

Easy

Solution

$For weak electrolytes; α = \frac{λ_{c}}{λ_{\infty}} = \frac{45}{450} = 0 .1;$
$[H^{+}] = C α (given C = 0.01 M)$
= $0.01 \times 0.1$
$= 10^{- 3}$
$p^{H} = 3$

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