What would be conductivity of M X 2 if conductivity of X - and M 2- is 5 ohm -1 cm 2 mol -1 and 6 ohm -1 cm 2 mol -1 respectively-A- 10 ohm -1 cm 2 mol -1B- 11 ohm -1 cm 2 mol -1C- 14 ohm -1 cm 2 mol -1D- 17 ohm -1 cm 2 mol -1

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Kohlrausch Law

What would be...

Question

What would be conductivity of $M X_{2}$ if conductivity of X- and $M^{2 +} i s 5 o h m^{- 1} c m^{2} m o l^{- 1} a n d 6 o h m^{- 1} c m^{2} m o l^{- 1}$ respectively?

10 o h m^{- 1} c m^{2} m o l^{- 1}

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11 o h m^{- 1} c m^{2} m o l^{- 1}

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14 o h m^{- 1} c m^{2} m o l^{- 1}

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17 o h m^{- 1} c m^{2} m o l^{- 1}

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Solution

The correct option is D $17 o h m^{- 1} c m^{2} m o l^{- 1}$
the value of equivalent conductance at infinite dilution for any electrolyte is the sum of contribution of its constituent ions.
$\land_{m}^{\circ} (M X_{2}) = \land_{m}^{\circ} (M^{2 +}) + 2 \land_{m}^{\circ} (x^{-}) = (5 + 2 \times 6) o h m^{- 1} c m^{2} m o l^{- 1} = 17 o h m^{- 1} c m^{2} m o l^{- 1}$
So conductivity of $M X_{2}$ _{$= (5 + 2 * 6) o h m^{- 1} c m^{2} m o l^{- 1}$}
$= 17 o h m^{- 1} c m^{2} m o l^{- 1}$

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What would be conductivity of MX2 if conductivity of X- and ​M2+is 5 ohm−1cm2 mol−1 and 6 ohm−1cm2 mol−1 respectively?

What would be conductivity of $M X_{2}$ if conductivity of X- and $M^{2 +} i s 5 o h m^{- 1} c m^{2} m o l^{- 1} a n d 6 o h m^{- 1} c m^{2} m o l^{- 1}$ respectively?