Unit 5: Reactivity 2: How Much, How Fast and How Far?
Topic 5.2: How Fast? The Rate of Chemical Change Questions
Practice 4 exam-style questions for IB Chemistry Topic 5.2. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Calculate2 marks
• Aimnova practice
In an experiment, the concentration of a product increases from 0 to 0.48 mol dm⁻³ in the first 24 s.
Calculate the average rate of reaction over this interval, including its units. [2]
Calculate the average rate of reaction over this interval, including its units. [2]
Markscheme and model answer locked
Unlock Question2Explain3 marks
• Aimnova practice
Using collision theory, explain why increasing the concentration of a reactant increases the rate of reaction, and state the two requirements for a collision to be effective. [3]
Markscheme and model answer locked
Unlock Question3Explain3 marks
• Aimnova practice
Explain, in terms of the Maxwell-Boltzmann distribution, why increasing the temperature increases the rate of a reaction. [3]
Markscheme and model answer locked
Unlock Question4Explain3 marks
• Aimnova practice
A catalyst is added to a reaction at constant temperature.
(a) Explain, in terms of activation energy and the Maxwell-Boltzmann distribution, how the catalyst increases the rate.
(b) State why the enthalpy change of the reaction is unaffected. [3]
(a) Explain, in terms of activation energy and the Maxwell-Boltzmann distribution, how the catalyst increases the rate.
(b) State why the enthalpy change of the reaction is unaffected. [3]
Markscheme and model answer locked
Unlock QuestionReady to practice Topic 5.2?
Get instant AI feedback on your answers, view detailed markschemes, and track your progress across all IB Chemistry topics.