The molar ionic conductances at infinite dilution of Mg2+ and Cl− are 106.1 and 76.3 ohm−1ohm−1cm2mol−1 respectively. The Molar conductance of solution of MgCl2 at infinite dilution is
A
29.8ohm−1cm2mol−1
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B
183.4ohm−1cm2mol−1
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C
285.7ohm−1cm2mol−1
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D
258.7ohm−1cm2mol−1
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Solution
The correct option is D258.7ohm−1cm2mol−1 Λ−MgCl2=λ−Mg2++2λ−Cl− =106.1+2 × 76.3 = 258.7