Ka and Kb calculations

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Intros
Lessons
  1. Applying the Ka expression
  2. Weak acids/bases at equilibrium.
  3. Assumptions made in calculation.
  4. Calculating pH and percentage dissociation.
  5. Calculations using Kb.
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Examples
Lessons
  1. Find the pH of the weak acid solution and the percentage dissociation of the weak acid/base.
    1. What is the pH of a solution of 0.5 M ethanoic acid, CH3COOH? Find the percentage dissociation of this ethanoic acid solution.
    2. What is the pH of a solution of 0.1 M ammonia, NH3? Find the percentage dissociation of this ammonia solution.
  2. Find the Ka of an unknown weak acid, given pH and concentration.
    1. A solution of carbonic acid had a pH of 3.72. What was the initial concentration of this acid solution?