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NEET Chemistry · Hard

Equilibrium: Weak acid numeric MCQ

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Weak acid numericHardQuestion 24080

Question

For a weak acid HA of concentration C and small ionisation, [H+^+] is approximately:

  1. A
    KaC\sqrt{K_aC}
    Correct
  2. B
    Ka/CK_a/C
  3. C
    Ka+CK_a+C
  4. D
    C2/KaC^2/K_a

Correct answer

KaC\sqrt{K_aC}

Explanation

This common approximation is valid when ionisation is small.

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