Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2(SO4)3. Given that ΛoAl3+ and ΛoSO2−4 are the equivalent conductances at infinite dilution of the respective ions?
A
2ΛoAl3+ + 3ΛoSO2−4
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B
ΛoAl3+ + ΛoSO2−4
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C
(ΛoAl3+ + ΛoSO2−4) x 6
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D
13ΛoAl3+ + 12ΛoSO2−4
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Solution
The correct option is AΛoAl3+ + ΛoSO2−4 At infinite dilution, when dissociation is complete, each ion makes a definite contribution towards the molar conductance of the electrolyte irrespective of the nature of the other ion with which it is associated.