Chemistry Scaling TCE 2026: Does It Scale Up or Down?

What Chemistry actually asks of you

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.

The Chemistry exam is Wednesday 18 November 2026, 1.30 pm (3 hours working time (15 minutes preparation time)). Source: TCE timetable.

The 20 areas of study you are examined on

From the Chemistry Level 4 course current for 2026 (version 4e amendment approved 16 September 2026); EAS Version 2 (February 2022, listed with current course); Information Sheet Version 2 (February 2026). Frozen sources downloaded 23 September 2026..

• Redox foundations
  Oxidation 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.
  In the exam: External Criterion 5: identify and apply electrochemical principles.
  Where marks go missing: Confusing oxidation state with ionic charge, or naming an agent without explaining the electron change.
• Balancing in acidic solution
  Build 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.
  In the exam: External Criterion 5: construct half-equations and overall redox equations.
  Where marks go missing: Using H− instead of H+, omitting states/charges, or failing to check total charge.
• Reduction potentials and spontaneity
  Use 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.
  In the exam: External Criterion 5: compare electrode potentials and predict redox reactions.
  Where marks go missing: Reversing a half-equation without changing its potential sign, or comparing unrelated oxidiser and reducer species.
• Cells and circuit conventions
  A 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.
  In the exam: External Criterion 5: represent galvanic cells, cell notation and circuit processes.
  Where marks go missing: Calling every spontaneous redox reaction a cell, or drawing electron flow through solution or air.
• Electrolysis and corrosion
  Electrolysis 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.
  In the exam: External Criterion 5: predict electrolysis products and apply electrochemistry to corrosion and metal processing.
  Where marks go missing: Ignoring competing reactions, or treating corrosion as a non-redox surface change.
• Energy and enthalpy
  Represent energy changes with consistent system boundaries, signs and energy profiles. Explain how bond changes relate to enthalpy and distinguish reaction enthalpy from activation energy.
  In the exam: External Criterion 6: apply thermochemical principles.
  Where marks go missing: Calling a catalyst an energy source or reversing the sign of heat without naming the system.
• Calorimetry and experimental limits
  Use 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.
  In the exam: External Criterion 6: interpret thermochemistry and evaluate experimental evidence.
  Where marks go missing: Using an unexplained sign convention or reporting a heat value with no units or molar basis.
• Kinetics and collision theory
  Rate 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.
  In the exam: External Criterion 6: apply kinetics and interpret rate evidence.
  Where marks go missing: Claiming particles move faster because collisions become more frequent, without linking temperature to kinetic energy.
• Dynamic equilibrium and Kc
  A 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.
  In the exam: External Criterion 6: calculate and interpret equilibrium constants.
  Where marks go missing: Including solids in Kc or describing equilibrium as a stopped reaction.
• Equilibrium shifts and acid-base systems
  Use 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.
  In the exam: External Criterion 6: analyse equilibrium and acid-base systems quantitatively and qualitatively.
  Where marks go missing: Saying a catalyst changes equilibrium position, or treating pH as a linear scale.
• Periodic structure and trends
  Electron configuration, effective nuclear attraction, shielding and distance explain periodic changes in properties. Use specific evidence to explain both general trends and the relevant exception.
  In the exam: External Criterion 7: explain properties of inorganic matter using chemical principles.
  Where marks go missing: Stating a trend without a particle-level cause, or confusing oxidation number and charge.
• Gases and particle models
  Kinetic 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.
  In the exam: External Criterion 7: explain gas behaviour and inorganic chemical properties.
  Where marks go missing: Using Celsius in a gas equation or claiming ideal particles have no mass rather than negligible volume/intermolecular forces.
• Organic structure and nomenclature
  Recognise functional groups and represent molecular structure with accepted formula conventions. IUPAC names and complete structural drawings communicate the same chemical identity without ambiguity.
  In the exam: External Criterion 7: identify organic structures and properties.
  Where marks go missing: Naming a broad family when the question asks for a particular molecule, or omitting required hydrogens.
• Organic reactions and synthesis
  Functional 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.
  In the exam: External Criterion 7: demonstrate understanding of organic reactions and chemical synthesis.
  Where marks go missing: Drawing an unbalanced transformation or a polymer repeat unit without bonds continuing through the chain.
• Spectroscopy and properties
  Treat 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.
  In the exam: External Criterion 7: interpret analytical data and explain matter properties.
  Where marks go missing: Giving a structure without citing a diagnostic wavenumber or treating a missing peak as positive evidence.
• Moles, equations and yield
  Use 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.
  In the exam: External Criterion 8: solve stoichiometric chemical problems.
  Where marks go missing: Calculating product from the excess reagent or applying the mole ratio before balancing the equation.
• Solutions and volumetric analysis
  Relate 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.
  In the exam: External Criterion 8: solve solution and titration calculations.
  Where marks go missing: Using burette volume as though it were the total sample volume or skipping the mole ratio.
• Gas and formula calculations
  Use 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.
  In the exam: External Criterion 8: solve gas, composition and formula problems.
  Where marks go missing: Rounding before the final step or reporting an empirical ratio that is not checked for a whole-number formula.
• Energy, rate and equilibrium calculations
  Select 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.
  In the exam: External Criterion 8: solve quantitative thermochemistry, kinetics and equilibrium problems.
  Where marks go missing: Using a formula without defining symbols, omitting units, or accepting a negative concentration.
• Electrochemical calculations
  Connect 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.
  In the exam: External Criterion 8: solve quantitative electrochemistry problems.
  Where marks go missing: Using charge without converting through moles of electrons or applying the wrong half-equation coefficient.

Full Chemistry study-design guide →

How scaling works in Tasmania

In Tasmania, TASC rates each Level 3 and Level 4 course against its criteria, from your school's assessment and the external examination, and combines the ratings into an award from Exceptional Achievement down to Preliminary Achievement. Scaling then converts each award of Satisfactory Achievement or better into a course score on a common scale, by comparing every result a student achieved with the results of every other student across all their courses; in 2025 course scores ran from 1.0 to 26.0. Your Tertiary Entrance score combines your best course scores from any two years of senior secondary study to a total of 60 to 75 points — normally five 15-point courses — and the ATAR is your rank on that score. Scaling is recalculated every year from that year's cohort, so a published score range describes one past cohort and is never a guarantee.

Source: official TASC scaling report (PDF). Last checked 2026-08-18.

What scaling is not

Scaling is not a difficulty rating and it is not a bonus. It compares how the students in one subject performed across every other subject they took, so a subject scales up because of its cohort, not because of the paper. The consequence is practical: you cannot scale your way out of a weak result. The only lever you control is the raw mark, and the fastest way to move that is full-length timed practice against the real exam format.

Questions

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