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Which of the following expressions corre...

Which of the following expressions correctly represents the equivalent conductance at infinite dilution of `Al_2(SO_4)_3.` Given that `Lambda_(AI^(3+))^@` and `Lambda_(SO_4^(2-))^@` are the equivalent conductances at infinite dilution of the respective ions?

A

`2Lambda_(AI^(3+))^@+3Lambda_(SO_4^(2-))^@`

B

`Lambda_(AI^(3+))^@+Lambda_(SO_4^(2-))^@`

C

`(Lambda_(AI^(3+))^@+Lambda_(SO_4^(2-))^@)xx6`

D

`1/3Lambda_(AI^(3+))^@+1/2Lambda_(SO_4^(2-))^@`

Text Solution

Verified by Experts

The correct Answer is:
B
At infinite dilution, when dissociation is complete, each ion makes a definite contribution towards molar conductance of the electrolyte irrespective of the nature of the other ion with which it is associated.
Hence, `Lambda_(AI_2(SO_4)_3)^@=Lambda_(AI^3+)^@+Lambda_(SO_4^(2-))^@`
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