IB Chemistry SL · 2025
Unit 5: Reactivity 2: How much, how fast and how far?
99 past paper questions from 10 papers across 3 exam sessions. See what repeats, then practise the same skills with AI marking.
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SL archive · 2025 to 2026
Unit 5: Reactivity 2: How much, how fast and how far?
Latest exam session: May 2026
- questions
- 99
- questions
- papers
- 10
- papers
- exam sessions
- 3
- exam sessions
- micro-topics
- 10
Topics in Unit 5: Reactivity 2: How much, how fast and how far?
In syllabus order. The ring is the share of the marks each one carries.
5.1
How much? The amount of chemical change
47% of marks65 of the 138 marks across the 10 Chemistry SL papers analysed (47%) were on this topic. A past-paper pattern, not a guarantee for your next paper. · 46 questions
5.2
How fast? The rate of chemical change
28% of marks39 of the 138 marks across the 10 Chemistry SL papers analysed (28%) were on this topic. A past-paper pattern, not a guarantee for your next paper. · 28 questions
5.3
How far? The extent of chemical change
25% of marks34 of the 138 marks across the 10 Chemistry SL papers analysed (25%) were on this topic. A past-paper pattern, not a guarantee for your next paper. · 25 questions
Exam pattern
How often each micro-topic has been examined, year by year. Each label is explained under the grid.
Does it repeat?
Top 4 of 10 micro-topics for the next sitting. Numbers are questions per year.
fewermore
| Micro-topic | 2025 | 2026 |
|---|---|---|
| 9Le Châtelier's principle, 2025: 9 questions | 2Le Châtelier's principle, 2026: 2 questions | |
| 7The equilibrium constant Kc, 2025: 7 questions | 3The equilibrium constant Kc, 2026: 3 questions | |
| 15Titration and solution stoichiometry, 2025: 15 questions | 2Titration and solution stoichiometry, 2026: 2 questions | |
| 10Factors affecting rate and the Maxwell–Boltzmann distribution, 2025: 10 questions | 3Factors affecting rate and the Maxwell–Boltzmann distribution, 2026: 3 questions |
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Questions on Unit 5: Reactivity 2: How much, how fast and how far?, by exam session
Which papers asked about Unit 5: Reactivity 2: How much, how fast and how far?, and which question numbers. Open a paper to see them highlighted.
May 2026
10 questions across 2 papers
May 2025
33 questions across 6 papers
Specimen 2025
11 questions across 2 papers
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Frequently asked questions
Short answers about this page.
Which Chemistry SL exam sessions are covered for Unit 5: Reactivity 2: How much, how fast and how far??
3 exam sessions from 2025 to 2026, the latest May 2026. Every Paper 1 and 2 in every timezone is read and classified in full, which gives 10 papers in this archive.
Which Unit 5: Reactivity 2: How much, how fast and how far? topic comes up most?
Le Châtelier's principle (5.3.2): in 80% of papers, last seen May 26 P2 TZA. Usually "explain / justify", worth about 1.9 marks in a paper that includes it.
Can I see the original question and mark scheme?
No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.
What do "banker", "due" and "rising" mean?
Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.
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