The resistivity of a 0.8 M solution of an electrolyte is . Its molar conductivity is ________ . (Nearest Integer) [2023]

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Solution

Q.
The resistivity of a 0.8 M solution of an electrolyte is $5 \times 10^{- 3} Ω cm$ . Its molar conductivity is ________ $\times 10^{4} Ω^{- 1} {cm}^{2} {mol}^{- 1}$ . (Nearest Integer) [2023]

Ans.
(25)

$Resistivity (ρ) = 5 \times 10^{- 3} Ω cm$

$Molarity (M) = 0.8 M$

$Molar conductivity (λ_{M}) = \frac{1}{ρ} \times \frac{1000}{M}$

$= \frac{1}{5 \times 10^{- 3}} \times \frac{1000}{0.8}$

$= 0.25 \times 10^{6}$

$= 25 \times 10^{4} {cm}^{2} {mol}^{- 1}$

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