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R2.3 Chemical Equilibrium (IBDP Chemistry)

R2.3 Chemical Equilibrium (IBDP Chemistry)

Subject: Chemistry

Age range: 16+

Resource type: Lesson (complete)

Last updated

10 May 2026

pptx, 3.45 MB
pptx, 3.45 MB

This PowerPoint lesson covers chemical equilibrium for IBDP Chemistry (first examination 2025) and gives students a clear introduction to how reversible reactions behave in closed systems. It is designed to help students understand the defining features of equilibrium and to distinguish clearly between equal reaction rates and equal concentrations, which is a very common area of confusion.

Chemical equilibrium is a dynamic state in a closed system where the forward and reverse reactions continue at equal rates, so there is no overall change in the concentrations of reactants and products. This lesson helps students understand that equilibrium does not mean the reaction has stopped, and it does not mean that the amounts of reactants and products must be equal. Instead, equilibrium is recognised when concentrations become constant because both directions of reaction are happening at the same rate.

This fully editable PowerPoint (.pptx) is ideal for classroom teaching, revision or flipped learning in the IB Diploma Programme. The lesson introduces key terms such as chemical equilibrium, closed system, reaction vessel and homogeneous equilibrium, then develops the concept through clear examples including the Haber process and the equilibrium between sulfur dioxide, oxygen and sulfur trioxide. Students are shown how equilibrium can be reached starting from either reactants or products, and how both rate–time and concentration–time graphs can be used to interpret what is happening as equilibrium is established.

The resource includes a retrieval starter, key definitions, structured explanations, worked examples, graph interpretation and practice questions with answers. It is especially useful for building a strong conceptual foundation before students move on to equilibrium constants, Le Chatelier’s principle and more advanced thermodynamic links later in the course.

File type included: editable PowerPoint (.pptx)
Last updated: 2026 – improved explanations of dynamic equilibrium, strengthened graph interpretation, and refined lesson flow to align with IB Chemistry first examination 2025.

Get this resource as part of a bundle and save up to 33%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

Bundle

BUNDLE R2 How Much, How Fast and How Far? SL Content Only (IBDP Chemistry)

This bundle of PowerPoints covers IBDP Chemistry SL R2: How Much, How Fast and How Far? for first examination 2025, bringing together quantitative chemistry, kinetics and equilibrium in one structured teaching resource. It is designed to help students build secure understanding across the whole SL R2 topic, from writing equations and calculating yields to explaining reaction rates and predicting equilibrium changes. In IBDP Chemistry, this area of the course focuses on three linked ideas: how much chemical change occurs, how fast it happens, and how far a reversible reaction proceeds before reaching equilibrium. This bundle supports students in mastering those ideas step by step. The lessons move from stoichiometry and reacting ratios, through collision theory and Maxwell–Boltzmann distributions, to physical and chemical equilibrium, Kc and Le Châtelier’s principle. This makes the bundle ideal for teaching the full SL R2 topic in a coherent sequence rather than as isolated lessons. The bundle includes 11 editable PowerPoint (.pptx) lessons: R2.1 Chemical Equations, Reacting Ratios, Limiting and Excess Reactants, Theoretical and Percentage Yield, and Atom Economy. R2.2 Rate of Reaction, Factors Affecting the Rate of Reaction, and Maxwell–Boltzmann Distribution Curves. R2.3 Physical Equilibrium, Chemical Equilibrium, The Equilibrium Constant Kc and Magnitude of Kc, and Le Châtelier’s Principle. Across the bundle, students are supported with retrieval starters, key word definitions, worked examples, calculations, graph interpretation, particle-level explanations, and practice questions with answers. The resources are suitable for first teaching, revision, cover lessons or flipped learning, and they align closely with the IBDP Chemistry specification for first examination 2025. File types included: editable PowerPoint (.pptx) files. Last updated: 2026 – refined lesson sequencing, improved clarity of calculations and explanations, and enhanced practice tasks across stoichiometry, kinetics and equilibrium.

£14.80
Bundle

BUNDLE R2.3 How Far? The Extent of Chemical Change, SL Content Only (IBDP Chemistry)

This bundle of PowerPoints covers IBDP Chemistry SL R2.3 How Far? The Extent of Chemical Change for first examination 2025, including physical equilibrium, chemical equilibrium, the equilibrium constant Kc, and Le Châtelier’s principle. It provides a clear, carefully sequenced set of lessons that help students move from the basic idea of dynamic equilibrium to quantitative equilibrium expressions and prediction of equilibrium shifts. The extent of chemical change describes how far a reversible process or reaction proceeds before equilibrium is established. In this topic, students learn that equilibrium is a dynamic state reached in a closed system, where forward and reverse processes continue at equal rates and macroscopic properties remain constant. The bundle begins with physical equilibrium, using familiar examples such as evaporation and condensation and iodine sublimation, before moving into chemical equilibrium in reversible reactions such as the Haber process. This gives students a strong conceptual foundation before introducing calculations and prediction. The bundle includes 4 editable PowerPoint (.pptx) lessons. Lesson 1: Physical Equilibrium explains dynamic equilibrium in physical systems and the importance of a closed system. Lesson 2: Chemical Equilibrium develops the same ideas for reversible chemical reactions and introduces equilibrium graphs and homogeneous systems. Lesson 3: The Equilibrium Constant Kc and Magnitude of Kc teaches students how to write Kc expressions, calculate Kc from equilibrium concentrations, and relate the size of Kc to the composition of the equilibrium mixture. Lesson 4: Le Châtelier’s Principle helps students predict and explain the effect of changing concentration, pressure, temperature and catalysts on equilibrium systems. Across the bundle, students are supported with retrieval starters, key definitions, worked examples, graph interpretation, equilibrium calculations, and practice questions with answers. This resource is ideal for first teaching, revision, or planning a complete SL equilibrium sequence aligned to the IBDP Chemistry 2025 specification. File types included: editable PowerPoint (.pptx) files. Last updated: 2026 – improved sequencing, clearer support for Kc calculations and equilibrium shifts, and enhanced practice tasks aligned to IB assessment objectives.

£5.35

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