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What will be the molar conductivity of A l 3 + ions at infinite dilution if molar conductivity of A l 2 ( S O 4 ) 3 is 858 S c m 2 m o l - 1 and ionic conductance of S O 4 2 - is 160 S c m 2 m o l - 1 at infinite dilution?

Options

  1. A189 S c m 2 m o l - 1
  2. B698 S c m 2 m o l - 1
  3. C1018 S c m 2 m o l - 1
  4. D429 S c m 2 m o l - 1

Correct answer

A. 189 S c m 2 m o l - 1

Step-by-step solution

Λ A l 2 ( S O 4 ) 3 o = 2 Λ A l 3 + o + 3 Λ S O 4 2 - o Λ A l 3 + o = Λ A l 2 ( S O 4 ) 3 o - 3 Λ S O 4 2 - o 2 = 858 - ( 3 × 160 ) 2 = 189 S c m 2 m o l - 1

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