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NotesChemistryTopic 5.1
Unit 5 · Reactivity 2: How much, how fast and how far? · Topic 5.1

IB Chemistry — How much? The amount of chemical change

Topic 5.1 of IB Chemistry covers How much? The amount of chemical change, which is part of Unit 5: Reactivity 2: How much, how fast and how far?. Students explore key concepts including Chemical equations and stoichiometry, Reacting masses and the limiting reactant, Percentage yield and atom economy, and more. A strong understanding of how much? the amount of chemical change is essential for IB Chemistry exams and builds the foundation for connected topics across the syllabus.

Exam technique guidePractice questions

What you'll learn in Topic 5.1

  • 5.1.1 Chemical equations and stoichiometry
  • 5.1.2 Reacting masses and the limiting reactant
  • 5.1.3 Percentage yield and atom economy
  • 5.1.4 Reacting gas volumes
  • 5.1.5 Titration and solution stoichiometry
Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 5.1 How much? The amount of chemical change

5.1.1

Chemical equations and stoichiometry

Notes
5.1.2

Reacting masses and the limiting reactant

Notes
5.1.3

Percentage yield and atom economy

Notes
5.1.4

Reacting gas volumes

Notes
5.1.5

Titration and solution stoichiometry

Notes

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Topic 5.1 How much? The amount of chemical change forms a core part of Unit 5: Reactivity 2: How much, how fast and how far? in IB Chemistry. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

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