Explore Chemistry at accredited Level 4. Course level is distinct from the school year in which you study it.
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What will I learn?
Redox foundations
Accredited course guide — check versionOxidation is electron loss and reduction is electron gain. Use oxidation-state changes and balanced equations to identify both agents and show the electron transfer that supports the conclusion.
Balancing in acidic solution
Accredited course guide — check versionBuild oxidation and reduction half-equations, balance atoms with H2O and H+, balance charge with electrons, then scale and add. Current course version 4e specifies H+(aq); it does not use hydride for acidic balancing.
Reduction potentials and spontaneity
Accredited course guide — check versionUse the electrochemical series as reduction potentials, compare compatible redox couples and calculate E°cell under standard conditions. Explain spontaneity through a positive cell potential and the species that accepts/donates electrons.
Cells and circuit conventions
Accredited course guide — check versionA galvanic cell couples oxidation and reduction through an external electron path and internal ion movement. Label anode/cathode, polarity, electrolyte and salt bridge precisely; show electrons travelling through the wire.
Electrolysis and corrosion
Accredited course guide — check versionElectrolysis applies external electrical energy to drive a non-spontaneous change; competing aqueous products depend on species, concentrations and electrode material. Corrosion is an electrochemical process that can be controlled by suitable barriers or sacrificial protection.
Energy and enthalpy
Accredited course guide — check versionRepresent energy changes with consistent system boundaries, signs and energy profiles. Explain how bond changes relate to enthalpy and distinguish reaction enthalpy from activation energy.
Calorimetry and experimental limits
Accredited course guide — check versionUse q=mcΔT and supplied calibration terms to estimate heat transfer, then link energy to the amount reacting. Assess heat loss, assumptions, measurement precision and whether a temperature rise means the reaction or surroundings released heat.
Kinetics and collision theory
Accredited course guide — check versionRate depends on effective collisions and activation energy. Temperature, concentration, pressure, surface area and catalysts affect collision frequency or the fraction of particles able to react in ways that can be explained from the model.
Dynamic equilibrium and Kc
Accredited course guide — check versionA closed reversible system at equilibrium has equal forward and reverse rates, not necessarily equal concentrations. Write Kc from the balanced equation and omit pure solids and liquids before substituting equilibrium concentrations.
Equilibrium shifts and acid-base systems
Accredited course guide — check versionUse Q relative to K and Le Chatelier's principle to predict a response to a changed condition, then distinguish rate from final position. Apply Brønsted-Lowry pairs, Ka, Kw, pH and titration evidence to the specific acid-base system.
Periodic structure and trends
Accredited course guide — check versionElectron configuration, effective nuclear attraction, shielding and distance explain periodic changes in properties. Use specific evidence to explain both general trends and the relevant exception.
Gases and particle models
Accredited course guide — check versionKinetic molecular theory connects particle motion and collisions to pressure, volume and temperature. Apply the gas equations with kelvin and consistent pressure/volume units, while recognising ideal-gas assumptions and any supplied non-ideal context.
Organic structure and nomenclature
Accredited course guide — check versionRecognise functional groups and represent molecular structure with accepted formula conventions. IUPAC names and complete structural drawings communicate the same chemical identity without ambiguity.
Organic reactions and synthesis
Accredited course guide — check versionFunctional groups determine characteristic reaction pathways; select reagents and conditions that produce the intended product. Explain how yield, purity and polymer structure depend on the route and process choices.
Spectroscopy and properties
Accredited course guide — check versionTreat IR and mass-spectrometry data as complementary evidence. Identify diagnostic features, test candidate structures against every relevant observation, and relate molecular polarity/intermolecular forces to physical properties where asked.
Moles, equations and yield
Accredited course guide — check versionUse a balanced equation to convert between amount of reactant and product, identify the limiting reagent, and compare actual with theoretical yield. Preserve units and explain what each calculated amount represents.
Solutions and volumetric analysis
Accredited course guide — check versionRelate amount, volume and concentration through a balanced reaction ratio. Include dilution, aliquot and titre relationships explicitly so the final concentration corresponds to the original sample.
Gas and formula calculations
Accredited course guide — check versionUse molar mass, composition and gas relationships to infer amounts or formulae. Convert temperature to kelvin, keep pressure and volume units compatible, and check integer atom ratios against the evidence.
Energy, rate and equilibrium calculations
Accredited course guide — check versionSelect the relationship that matches the supplied quantities, show substitutions and interpret the result chemically. For equilibrium or rate work, check that calculated amounts remain possible and respond to any requested condition change.
Electrochemical calculations
Accredited course guide — check versionConnect potential, amount of electrons and electrical charge to the specified cell or electrolysis task. Use q=It and Faraday's constant with stoichiometric electron ratios, then report mass, current or time with units and suitable precision.
How will I be assessed?
School arrangements: TASC course assessment applies to the accredited course and level, whether you take it in Year 11 or Year 12. Check criteria, work requirements and any external assessment in the course document, plus your provider’s internal assessment outline.
Needs verification: Accredited course guide (Chemistry Level 4 (CHM415115), version 4e (amendment approved 16 September 2026), re-accredited by TASC as ongoing from 1 January 2026 (no expiry date), so it applies in 2027; EAS Version 2 (February 2022); Information Sheet Version 2 (February 2026). Frozen sources downloaded 23 September 2026.): The written examination is 180 numeric marks across four compulsory 45-mark sections assessing Criteria 5–8, with 3 hours working time and 15 minutes preparation. TASC combines four external criterion ratings with eight internal ratings to determine the final course award; this practice hub's marks are an exam rehearsal scheme, not a percentage weighting for the final award. Confirm the syllabus and assessment schedule for your own completion year.
Progression and companion subjects
No complete companion or exclusion review is attached to this profile. Check the official course-entry conditions, language eligibility and your school’s sequence before enrolling. Links between resource hubs show related learning; they do not establish a compulsory prerequisite.
Will I find it hard?
Difficulty depends on your experience, interests, teaching and assessment. These are our reflection prompts, not an official difficulty rating.
- Look at how much data, calculation and graph interpretation appear in the sample for this particular science.
- Can you explain the ideas in your own words as well as recall the terminology?
- Do investigations and evaluating evidence interest you? Check the course’s practical requirements.
Does it scale up or down?
TASC awards and scaled TE scores are distinct. The old requirement for three final-year results was removed from 2025.
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Scaling is not a measure of difficulty or a guaranteed bonus. Prioritise content you can engage with and required subjects for courses you are considering.
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Electron transfer, oxidation states and redox agents
1. Recognise oxidation and reduction together Oxidation is loss of electrons and reduction is gain of electrons. They occur together because electrons released by one species must be accepted by another. In the reaction Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s), zinc atoms form zinc ions and release two electrons: Zn → Zn²⁺ + 2e⁻. Copper(II) ions accept those electrons: Cu²⁺ + 2e⁻ → Cu. The balanced equation conserves atoms and charge, while the half-equations expose the transfer that the overall equation hides. This separation between visible change and electron transfer is also useful when observations are noisy: bubbles can be trapped air, and a precipitate can form without redox. Use an independent measurement or species test when the conclusion depends on identifying the product. For a quick diagnostic, count electrons in the half-equations before interpreting the apparatus. If the zinc electrode loses mass while copper forms on the other electrode, the particle account predicts zinc atoms enter solution as Zn²⁺ and Cu²⁺ leaves solution as copper metal. A mismatch between the visible observation and this prediction is a reason to recheck electrode labels, solution identity or the proposed reaction, rather than to relabel oxidation and reduction. Do not decide whether a process is redox merely because a visible change occurs. A colour change may result from acid-base chemistry, complex formation or dilution. Instead, compare oxidation states or construct half-equations. In an unfamiliar context, identify the species before naming the process: state symbols and ionic charges distinguish a neutral metal from its dissolved ion. This disciplined start prevents the common mistake of treating dissolution as oxidation in every case; the chemical equation must show electron loss
Original practice question: A sample of NaCl has a mass of 5.85 g. Calculate the amount in moles. Use M(NaCl)=58.5 g mol⁻¹ and give an appropriate number of significant figures.
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Worked solution
This is ATARMAxxing’s original sample learning material. It is not an official assessment task or a prediction of your school’s workload.
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Sources, versions and verification dates
Profile source metadata last checked: 2026-11-14. A source check is not an endorsement by the authority or confirmation that a future course version is unchanged.
- ATARMAxxing Chemistry Level 4 (CHM415115), version 4e (amendment approved 16 September 2026), re-accredited by TASC as ongoing from 1 January 2026 (no expiry date), so it applies in 2027; EAS Version 2 (February 2022); Information Sheet Version 2 (February 2026). Frozen sources downloaded 23 September 2026. guide — ATARMAxxing; 2026-11-14. Original existing study guide, not an independent official verification or a forecast of a future syllabus.
- Chemistry CHM415115 — Level 4 — TASC; 2026-11-12. Official source snapshot; Course span 2015 onwards. Check accreditation and school delivery for your cohort.