Reaction Kinetics

Worked examples (6)

• 1Calculating an average rate (2 marks)
• 2Methods to follow a reaction (2 marks)
• 3Effect of concentration (3 marks)
• 4Effect of surface area (3 marks)
• 5Rate from a concentration–time graph (3 marks)
• 6Instantaneous rate by tangent (4 marks)

Worked examples (6)

• 1Defining activation energy (1 mark)
• 2Features of a Boltzmann distribution (3 marks)
• 3Explaining the temperature effect (4 marks)
• 4Comparing two Boltzmann curves (3 marks)
• 5Why a small T rise gives a big rate increase (4 marks)
• 6Temperature vs concentration effect (3 marks)

Worked examples (5)

• 1Classifying catalysts (2 marks)
• 2How a catalyst speeds a reaction (4 marks)
• 3How a heterogeneous catalyst works (3 marks)
• 4Homogeneous catalysis via an intermediate (4 marks)
• 5Why a catalyst doesn't change yield (3 marks)

Worked examples (6)

• 1Order from doubling a concentration (2 marks)
• 2Units of the rate constant (2 marks)
• 3Rate equation from initial-rates data (4 marks)
• 4First-order half-life (3 marks)
• 5Reading order from graphs (4 marks)
• 6Order and the rate-determining step (4 marks)

Worked examples (6)

• 1Classifying catalysts (2 marks)
• 2Why transition metals catalyse (2 marks)
• 3Homogeneous catalysis by Fe³⁺ (4 marks)
• 4Autocatalysis (3 marks)
• 5Heterogeneous catalysis with variable oxidation state (4 marks)
• 6Heterogeneous catalysis by adsorption (3 marks)