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Standard XII

Physics

Energy Levels

The molar ion...

Question

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:

29.8 {S cm}^{2} {mol}^{- 1}

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183.4 {S cm}^{2} {mol}^{- 1}

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285.7 {S cm}^{2} {mol}^{- 1}

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258.7 {S cm}^{2} {mol}^{- 1}

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Solution

The correct option is D $258.7 {S cm}^{2} {mol}^{- 1}$
$Λ_{(M g C l_{2})}^{0} = λ^{0} M g^{2 +} + 2 λ^{0} C l^{-}$
$= 106.1 + 2 \times 76.3$
$= 258.7 {S cm}^{2} {mol}^{- 1}$

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The molar ionic conductance at infinite dilution of Mg2+ and Cl− ions are 106.1 and 76.3 S cm2 mol−1 respectively. The molar conductance of a solution of MgCl2 at infinite dilution is:

The correct option is D 258.7 S cm2 mol−1Λ0(MgCl2)=λ0Mg2++2λ0Cl− =106.1+2×76.3 =258.7 S cm2 mol−1

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:

The correct option is D $258.7 {S cm}^{2} {mol}^{- 1}$
$Λ_{(M g C l_{2})}^{0} = λ^{0} M g^{2 +} + 2 λ^{0} C l^{-}$
$= 106.1 + 2 \times 76.3$
$= 258.7 {S cm}^{2} {mol}^{- 1}$