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NEETChemistryIonic Equilibrium

What is the pK a value for ammonia, and what pH is expected for a buffer solution formed by equal molar concentrations of ammonia and ammonium chloride?

Options

  1. ApKa = 9.25, pH ≈ 9.25
  2. BpKa = 4.76, pH ≈ 4.76
  3. CpKa = 7.00, pH ≈ 7.00
  4. DpKa = 3.00, pH ≈ 3.00

Correct answer

A. pKa = 9.25, pH ≈ 9.25

Step-by-step solution

The pK a value for ammonia is 9.25, and the pH of a buffer solution formed by equal molar concentrations of ammonia and ammonium chloride will be around 9.25.

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