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KVPY2012ChemistryChemical Equilibrium

The pK _ a of a weak acid is 5.85 . The concentrations of the acid and its conjugate base are equal at a pH of -

Options

  1. A6.85
  2. B5.85
  3. C4.85
  4. D7.85

Correct answer

B. 5.85

Step-by-step solution

pH = p Ka + [ Conjugate base] [ Acid ] [ Conjugate base ]=[ Acid ] pH = pKa =5.85

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