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Kohlrausch Law

The molar con...

Question

The molar conductivities of $K C I$ , $N a C l$ and $K N O_{3}$ are $152, 128$ and $111 S c m^{2} m o l^{- 1}$ respectively. What is the molar conductivity of $N a N O_{3}$ ?

A

101 S c m^{2} m o l^{- 1}

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B

87 S c m^{2} m o l^{- 1}

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C

- 101 S c m^{2} m o l^{- 1}

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D

- 391 S c m^{2} m o l^{- 1}

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Solution

The correct option is A $87 S c m^{2} m o l^{- 1}$
$\land_{N a N o_{3}} = \land_{N a C l} + \land_{K N O_{3}} - \land_{k c l}$
$= 128 + 111 - 152$
$= 87$

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