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AIIMS2009ChemistryIonic Equilibrium

pH of a 0.01 M solution (K_a=6.6 10⁻⁴ )

Options

  1. A7.6
  2. B8
  3. C2.6
  4. D5

Correct answer

C. 2.6

Step-by-step solution

aligned & = K_a C = 6.6 10⁻⁴ 0.01 = 6.6 10⁻² =0.257 & [ H ⁺ ]= C =0.01 0.257=2.57 10⁻³ & pH =3- 2.5=2.60 aligned

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