Every subtopic of DP Chemistry, ready to teach.

The 12 lessons in this unit address four topics: experimental measurement of enthalpy changes using calorimetry; the construction and application of Hess's law energy cycles using bond enthalpies and standard enthalpies of formation; a comparative study of fossil fuels, biofuels, and hydrogen as energy sources; and the AHL topics of entropy, Gibbs energy, and the temperature dependence of spontaneity.

Skills & assessment. Students develop quantitative skills in processing experimental temperature data, applying Hess's law algebraically, and working with ΔG = ΔH − TΔS — all areas that feature directly in Paper 2 and Paper 3 calculations. Environmental and societal contexts around fuel combustion are explored in ways that support data-based and evaluative responses.

Across 9 lessons and 3 topics, this unit builds the quantitative and conceptual foundations of chemical change: mole ratio calculations, limiting reagents, and yield; the factors governing reaction rate, Maxwell–Boltzmann distribution, and graphical rate analysis; and dynamic equilibrium, the equilibrium constant expression Kc, ICE table calculations, and Le Chatelier's principle.

Skills & assessment. The unit develops the calculation fluency expected in Paper 1 and Paper 2 — from stoichiometric and titration problems to equilibrium constant expressions and concentration changes — alongside the qualitative reasoning required to predict and explain shifts in equilibrium and rate under changing conditions.

The 12 lessons across 4 topics examine proton transfer reactions including Brønsted–Lowry theory, pH and Kw calculations, and buffer equilibria; electron transfer reactions covering oxidation states, half-equations, and electrochemical cells; electron-sharing reactions including radical substitution, electrophilic addition, and addition polymers; and electron-pair sharing reactions covering nucleophilic substitution (SN1 and SN2), electrophilic substitution in benzene, and condensation reactions.

Skills & assessment. Students practise balancing half-equations, constructing mechanistic arrow-pushing sequences, and applying equilibrium concepts to acid–base systems — skills assessed across Paper 2 and Paper 3. Organic mechanisms are treated with the precision required at HL, with influencing factors and stereochemical considerations addressed where the syllabus demands.

Ten lessons across 5 topics establish the structural and quantitative foundations of chemistry: kinetic molecular theory and states of matter; atomic structure, isotopes, and mass spectrometry; shells, subshells, orbitals, and full electron configurations; the mole concept, Avogadro's constant, molar mass, and formula determination; and the ideal gas laws culminating in PV = nRT.

Skills & assessment. The unit builds the foundational calculation and conceptual skills — relative atomic mass from isotopic data, empirical and molecular formula determination, and gas law problem-solving — that underpin virtually all subsequent quantitative work and feature prominently in Paper 1 and Paper 2.

Nine lessons across 4 topics explore the three principal bonding models and their predictive power: ionic lattice formation and the physical properties of ionic compounds; Lewis structures, VSEPR, molecular geometry, polarity, and intermolecular forces; the metallic bonding model, electron sea theory, and alloys; and a comparative treatment of giant covalent, ionic, metallic, and molecular structures, extended to liquid crystals, polymers, and nanomaterials.

Skills & assessment. Students develop the ability to draw and interpret Lewis structures, apply VSEPR to predict geometries, and use bonding models to explain and compare physical properties — central skills in both data-based and extended-response questions across SL and HL papers.

Four lessons across 2 topics address periodic trends — atomic radius, ionisation energy, electronegativity, and the periodicity of Period 3 oxides and chlorides — and the systematic classification of organic compounds by functional group, including homologous series of alcohols, aldehydes, ketones, carboxylic acids, and esters.

Skills & assessment. Students practise explaining and predicting periodic trends using atomic structure, and develop the ability to identify, name, and compare functional groups systematically — skills that support both structured and extended-response questions in Papers 1 and 2.

Skills & assessment.