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0.007 M aqueous solution of aniline hydrochloride had molar conductivity equal to 119.4 ~S ~cm ^2 ~mol ⁻¹ , which became 103 ~S ~cm ^2 ~mol ⁻¹ , when a few drops of aniline were added to the solution. Molar conductivity of Hydrochloric acid in the same ionic concentration was found to be 413 ~S ~cm ^2 ~mol ⁻¹ . The Hydrolysis constant of aniline hydrochloride is (approx)

Options

  1. A2 10⁻⁴
  2. B2 10⁻⁵
  3. C2 10⁻⁶
  4. D2 10⁻⁷

Correct answer

B. 2 10⁻⁵

Step-by-step solution

= ₁- ₂ ₃- ₂ ₁ Molar conductivity of Salt ₂ Molar conductivity of Salt + Base ₃ Molar conductivity of Acid = (119.4)-(103) (413)-(103) =0.052 k _ h = ch ^2 1- 2 10⁻⁵ M

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