Equilibria

Worked examples (6)

• 1Writing a Kc expression (2 marks)
• 2Le Chatelier: concentration change (2 marks)
• 3Le Chatelier: temperature and pressure (4 marks)
• 4Calculating Kc (3 marks)
• 5Partial pressure and Kp (4 marks)
• 6Justifying industrial conditions (4 marks)

Worked examples (6)

• 1Identifying acid and base (2 marks)
• 2Identifying conjugate pairs (3 marks)
• 3Strong vs weak acid (4 marks)
• 4Neutralisation product (2 marks)
• 5Choosing an indicator (3 marks)
• 6Distinguishing strong from weak acid (4 marks)

Worked examples (6)

• 1pH of a strong acid (2 marks)
• 2[H⁺] from pH (2 marks)
• 3pH of a weak acid (4 marks)
• 4pH of a strong base (4 marks)
• 5pH of a buffer (4 marks)
• 6How a buffer resists pH change (4 marks)

Worked examples (6)

• 1Defining the partition coefficient (2 marks)
• 2Calculating Kpc (2 marks)
• 3Finding a concentration from Kpc (3 marks)
• 4Single solvent extraction (4 marks)
• 5Single vs double extraction (4 marks)
• 6Assumptions and limitations (3 marks)