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Concentration Terms - An Introduction (w/w etc)

At infinite d...

Question

At infinite dilution equivalent conductances of $B a^{+ 2}$ & $C 1^{-}$ ions are $127$ & $76$ $o h m^{- 1} c m^{- 1} e q^{- 1}$ respectively. Equivalent conductance of $B a C l_{2}$ at infinite dilution is:

A

139.5

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B

101.5

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C

203

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D

279

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Solution

The correct option is C $279$
$Λ_{e q}^{\infty} ({B a}^{2 +}) = 127 Ω^{- 1} {c m}^{- 1} {e q}^{- 1}$

$Λ_{e q}^{\infty} ({C l}^{-}) = 76 Ω^{- 1} {c m}^{- 1} {e q}^{- 1}$

$Λ_{e q}^{\infty} (B a {C l}_{2}) = Λ_{e q}^{\infty} ({B a}^{2 +}) + 2 Λ_{e q}^{\infty} ({C l}^{-})$

$= 127 + 76 \times 2$

$= 279 Ω^{- 1} {c m}^{- 1} {e q}^{- 1}$

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Concentration Terms - An Introduction (w/w etc)

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