First slide

Conductivity , Molar conductivity and Equivalent Conductivity

Question

Molar ionic conductivities of a bi-bivalent electrolyte are 57 and 73. The molar conductivity of the solution will be

Easy

A

130 S cm² mol^–1
B

65 S cm² mol^–1
C

260 S cm² mol^–1
D

187 S cm² mol^–1

Solution

Let the electrolyte is
${A^{ + 2}}{B^{ - 2}} \rightleftharpoons {A^{ + 2}} + {B^{ - 2}}$
$\lambda _{AB}^m = \lambda _{{A^{ + 2}}}^m + \lambda _{{B^{ - 2}}}^m = \left( {57 + 73} \right) = 130S\,c{m^{2\,}}mo{l^{ - 1}}$

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