Which of the following expressions correctly represents the equivalent conductance at infnite dilution of Al2(SO4)3. Given that ∘ΛAl3+ and ∘ΛSO2−4 are the equivalent conductances at infinite dilution of the respective ions?
A
2∘ΛAl3++3∘ΛSO2−4
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B
∘ΛAl3++∘ΛSO2−4
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C
(∘ΛAl3++∘ΛSO2−4)×6
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D
13∘ΛAl3++12∘ΛSO2−4
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Solution
The correct option is B∘ΛAl3++∘ΛSO2−4 At infinite diltuion, when dissociation is complete, each ion makes a definite contribution towards molar conductance of the electrolyte irrescpective of the nature of the other ion with which it is associated.
Hence, ∘ΛAl2(SO4)3=∘ΛAl3++∘ΛSO2−4