Unit 8.3: Weak Acid and Base Equilibria
Compare strong vs. weak acids and bases.
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What is the key difference in ionization between strong and weak
acids?
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How does the pH of a weak acid solution compare to a strong acid of
the same concentration?
Use a Ka expression to calculate the pH of a weak acid (or Kb for a weak
base).
- Calculate the pH of 0.10 M acetic acid (Ka = 1.8 × 10⁻⁵).
- Determine the pOH of 0.050 M ammonia (Kb = 1.8 × 10⁻⁵).
Calculate the pKa of a weak acid or pKb of a weak base.
- Find the pKa of acetic acid if Ka = 1.8 × 10⁻⁵.
- Determine the pKb of NH₃ given Kb = 1.8 × 10⁻⁵.
Determine the % ionization of a weak acid or base given its pKa (or pKb)
and starting concentration.
- Calculate the % ionization of 0.10 M acetic acid.
- Determine the % ionization of 0.05 M NH₃ solution.