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NEETChemistryIonic Equilibrium

In the Henderson-Hasselbalch equation for a buffer solution, what happens to the pH when the concentration of the conjugate base ([A-]) is equal to the concentration of the weak acid ([HA])?

Options

  1. AThe pH increases
  2. BThe pH decreases
  3. CThe pH remains unchanged
  4. DThe pH becomes neutral

Correct answer

C. The pH remains unchanged

Step-by-step solution

In the Henderson-Hasselbalch equation, when the concentration of the conjugate base ([A–]) is equal to the concentration of the weak acid ([HA]), the pH remains unchanged.

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