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Question 600427
JEE Chemistry · Hard

Chemical and Ionic Equilibrium: Ostwald dilution MCQ

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Ostwald dilutionHardQuestion 600427

Question

Ostwald dilution law states that for a weak electrolyte: α²/(1−α)V = Ka. For a very weak electrolyte (α << 1), this simplifies to:
  1. A
    α = Ka × V
  2. B
    α = √(KaV)
    Correct
  3. C
    α = Ka/V
  4. D
    Ka = α/V

Correct answer

α = √(KaV)

Explanation

For α << 1: Ka ≈ α²/V (where V = volume per mole = 1/C). So α² = KaV → α = √(KaV) = √(Ka/C).

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