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Standard XII

Chemistry

Equivalent, Molar Conductivity and Cell Constant

The molar ion...

Question

The molar ionic conductances at infinite dilution of $M g^{2 +}$ and $C l^{-}$ are 106.1 and 76.3 $o h m^{- 1} o h m^{- 1} c m^{2} m o l^{- 1}$ respectively. The Molar conductance of solution of $M g C l_{2}$ at
infinite dilution is

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

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

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

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

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Solution

The correct option is D $258.7 o h m^{- 1} c m^{2} m o l^{- 1}$
$Λ^{-} M g C l_{2} = λ^{-} M g^{2 +} + 2 λ^{-} C l^{-}$
=106.1+2 $\times$ 76.3 = 258.7

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The molar ionic conductance at infinite dilution of $M g^{2 +}$ and $C l^{-}$ ions are $106.1$ and $76.3 {S cm}^{2} {mol}^{- 1}$ respectively. The molar conductance of a solution of $M g C l_{2}$ at infinite dilution is:

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The molar ionic conductances at infinite dilution of Mg2+ and Cl− are 106.1 and 76.3 ohm−1 ohm−1 cm2 mol−1 respectively. The Molar conductance of solution of MgCl2 at infinite dilution is

The correct option is D 258.7ohm−1cm2mol−1Λ−MgCl2=λ−Mg2++2λ−Cl− =106.1+2 × 76.3 = 258.7

The molar ionic conductances at infinite dilution of $M g^{2 +}$ and $C l^{-}$ are 106.1 and 76.3 $o h m^{- 1} o h m^{- 1} c m^{2} m o l^{- 1}$ respectively. The Molar conductance of solution of $M g C l_{2}$ at
infinite dilution is

The correct option is D $258.7 o h m^{- 1} c m^{2} m o l^{- 1}$
$Λ^{-} M g C l_{2} = λ^{-} M g^{2 +} + 2 λ^{-} C l^{-}$
=106.1+2 $\times$ 76.3 = 258.7