Three days left. Factors Affecting Rate is the single most reliable topic on this paper. Get that method locked first, then work through the four required practicals P2H always tests.
One focus per day, building to a timed run. Work it in order.
Ranked from analysed past papers. Start at the top: if you run out of time, you will have covered the most-tested ground.
The single highest-priority topic across the whole specification. Appeared in all 4 sessions analysed and is guaranteed content tied to RPA5, the rate of reaction practical.
Appeared in all 4 sessions with a rising trend. Frequently the largest question on the paper, often worth 15 marks in a single question.
Guaranteed content tied to RPA6, appearing in 3 of 4 sessions. Rf calculations and explaining separation are tested as a full question most years.
Guaranteed content tied to RPA8. Potable water production and mass/concentration calculations from evaporation data recur reliably, sometimes as a level-of-response question.
Appeared in all 4 sessions. Thermosoftening vs thermosetting polymers and addition polymerisation are common short-answer targets.
Appeared in all 4 sessions. Le Chatelier's principle applied to industrial processes like the Contact or Haber process is a recurring application question.
Appeared in 3 of 4 sessions with a strong rising trend. Often paired with recycling and life cycle assessment in the same question.
Appeared in all 4 sessions, tied to RPA7. Flame test colours and precipitate tests for anions and cations are reliable recall marks.
PrepWise has a one-page Knowledge Organiser for every topic above. Use them in your final 3 days with cover, recall, check, repeat: read it once, cover it, write out everything you remember, then check what you missed and go again.
Rules specific to Paper 2. On this paper, structure earns as many marks as knowledge.
Rate = amount of product (or reactant) ÷ time. If you're asked to find rate from a graph, draw a tangent at the point given, calculate the gradient (change in y ÷ change in x), and give your answer with the correct unit. This has been examined as a 5-mark question, so show every step.
Rf = distance moved by the spot ÷ distance moved by the solvent. Measure both from the same starting line (the pencil line, not the paper edge) and both must be measured to the same point on the spot: the centre, consistently.
If you change a condition, equilibrium shifts to oppose that change: increase pressure → shifts to the side with fewer gas molecules; increase temperature → shifts in the endothermic direction; increase concentration of a reactant → shifts to produce more product.
For 'evaluate' or 'compare' questions on materials or processes (e.g. recycling vs new production, one material vs another), give at least one advantage and one disadvantage for each option, then finish with a clear conclusion that states which is better and why.
Describe = say what happens, no reasons needed. Explain = say what happens AND why, using chemistry (collision theory, particle behaviour, bonding). Evaluate = weigh up both sides and reach a justified conclusion. Mixing these up is a common way to lose marks on an otherwise correct answer.
The errors examiners see most on this paper. Each one is an easy mark you already know how to keep.
Explaining rate changes without using collision theory language → Always say collisions become more frequent and/or more energetic. 'Particles move faster' alone doesn't get full marks.
Getting the direction of an equilibrium shift wrong under increased pressure → Remember: increasing pressure always shifts equilibrium to the side with fewer moles of gas. Count the moles on each side before deciding.
Confusing Rf value calculation by measuring from the wrong starting point → Measure both the spot distance and the solvent front distance from the same pencil baseline, never from the edge of the paper.
Naming the wrong flame test colour under exam pressure (mixing up lithium and calcium) → Learn them as a fixed list: lithium red, sodium yellow, potassium lilac, calcium orange-red, copper blue-green. Say them aloud until they're automatic.
Writing one-sided answers to 'evaluate' questions on recycling or life cycle assessment → Structure every evaluate answer as: point for, point against, then a conclusion that directly answers the question.
The 60 minutes before you walk in. Review what you know and settle your nerves.
The calculations only stick once you have actually done them under pressure. Practise exam-style Chemistry questions in PrepWise, get instant marking, and turn those method cards into marks.
Open the Chemistry Knowledge Organisers, quiz every priority topic and walk in ready. Free during alpha.
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