Conductance of Electrolytic Solutions – Ostwald's Dilution

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  1. 1 2021
    The molar conductivity of 0.007 M acetic acid is $20\ S\ cm^2\ mol^{-1}$. What is the dissociation constant of acetic acid? Choose the correct option. ($\Lambda^\circ_{H^+}=350\ S\ cm^2mol^{-1}$, $\Lambda^\circ_{CH_3COO^-}=50\ S\ cm^2mol^{-1}$)
    A $2.50\times10^{-4}\ mol\ L^{-1}$
    B $1.75\times10^{-5}\ mol\ L^{-1}$
    C $2.50\times10^{-5}\ mol\ L^{-1}$
    D $1.75\times10^{-4}\ mol\ L^{-1}$

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