HKDSE Chemistry study plan

Build a one-page formula and definition sheet covering atomic structure, the periodic table trends, ionic and covalent bonding, and intermolecular forces, writing each entry from memory before checking notes.

Draw electron diagrams and predict shapes for at least 12 species (e.g. CH4, NH3, H2O, BF3, SF6, CO2) and label bond polarity and net dipole for each.

Solve 20 structured questions on bonding and structure, marking every answer against the syllabus wording and logging each error with its cause.

Convert all masses, moles, and gas volumes in 15 calculations using the mole concept, molar volume at room temperature and pressure, and Avogadro's constant.

Write and balance at least 15 equations including ionic equations, identifying spectator ions and state symbols correctly.

Perform titration-style calculations for 10 cases covering limiting reagents, percentage yield, and concentration in mol dm-3.

Explain enthalpy changes of reaction, formation, and combustion using energy cycle diagrams for 8 worked examples, including Hess's law problems.

Sketch and interpret energy profile diagrams distinguishing exothermic and endothermic reactions and the role of activation energy and catalysts.

Classify at least 20 reactions as redox, acid-base, or precipitation, assigning oxidation numbers and identifying the species oxidised and reduced.

Describe trends in the reactivity series and write equations for reactions of metals with water, dilute acids, and oxygen.

Explain the chemistry of common acids and bases including strong versus weak behaviour, and calculate pH for 10 strong acid and strong base solutions.

Outline the extraction of iron and aluminium, linking each step to the underlying reduction chemistry.

Draw structural formulae and name at least 20 organic compounds across homologous series including alkanes, alkenes, alcohols, and carboxylic acids.

Predict and write equations for 10 addition and substitution reactions, distinguishing the conditions required for each.

Describe tests to distinguish alkenes from alkanes and to identify alcohols and carboxylic acids, stating the observation for each test.

Explain the formation of addition polymers and draw repeat units for at least 5 common polymers.

Interpret rate data and sketch concentration-time and rate-concentration graphs for 8 scenarios, explaining the effect of concentration, temperature, surface area, and catalysts using collision theory.

Apply Le Chatelier's principle to predict the shift in at least 8 equilibrium systems, stating the effect on yield and on the equilibrium constant where relevant.

Explain the chemistry of the Haber process and the contact process, justifying chosen conditions in terms of rate, yield, and cost.

Solve 10 equilibrium calculations involving Kc expressions and equilibrium concentrations.

Describe the chemistry of at least 6 industrial and everyday materials (e.g. detergents, bleach, fertilisers, alloys, plastics) linking structure to function.

Explain the role of chemical cells and electrolysis, writing electrode equations for 6 electrolysis setups including molten and aqueous electrolytes.

Evaluate the environmental impact of at least 4 chemical processes, including acid rain, greenhouse gases, and waste treatment, using correct terminology.

Interpret unfamiliar data-based scenarios by extracting the relevant chemistry and writing structured answers of 3-4 sentences each.

Complete one full past-paper-style paper under timed conditions, allocating time per section and leaving 10 minutes to check.

Mark the paper using the official marking scheme and classify every lost mark as knowledge, application, or presentation.

Redo all questions on the two weakest topics identified in the mock, writing model answers from memory before comparing.

Practise at least 10 data-based and experimental-design questions, stating variables, controls, and safety precautions explicitly.

Condense the whole syllabus into a 2-page final revision sheet of formulas, key equations, and named reactions, written from memory.

Complete a second timed paper and aim to improve the previous score by at least 10 percentage points.

Recite definitions and standard observations for at least 30 key tests and reactions without referring to notes.

Review the error log from all previous weeks and re-solve every item still marked unresolved.