Three days left and most of what costs you marks here isn't chemistry knowledge. It's the maths. Fix the calculation methods first, then lock in the four required practicals P1H always draws on.
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.
Appeared in all 4 analysed sessions and threads across both papers. Percentage yield, atom economy and gas volume calculations all rely on the same method.
Guaranteed content in every session analysed, always tied to RPA2. Concentration and mole calculations from titration data are a recurring multi-mark question.
Appeared in all 4 sessions, frequently as the largest question on the paper (14 marks in JUN24) and always linked to RPA4, the energy changes practical.
Appeared in all 4 sessions with a rising trend. Displacement reactions and planning experiments around reactivity are common extended-response questions.
Guaranteed content tied to RPA3. Electrode product rules and half equations are tested every session, sometimes with an unusual twist like coloured ion migration.
Appeared in all 4 sessions. Explaining electrical conductivity and malleability using delocalised electrons is a frequent short-answer target.
Guaranteed content tied to RPA1 in every session. The insoluble salt method (excess base, filter, evaporate, crystallise) is tested as a sequence.
Appeared in all 4 sessions. Questions on group trends and why elements are placed where they are recur as reliable early-paper 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 1. On this paper, structure earns as many marks as knowledge.
Write the formula first, sub in the numbers, and always state your final answer with the correct unit (mol). If the question then asks for percentage yield, divide actual by theoretical and multiply by 100. Show the theoretical mass calculation as a separate step so you pick up method marks even if your final number is wrong.
Atom economy = (Mr of desired product ÷ sum of Mr of all reactants) × 100. Balance the equation first: an unbalanced equation gives you the wrong Mr totals and loses the whole calculation, not just one mark.
Use moles = concentration × volume (in dm³, so divide cm³ by 1000). Find moles of the known solution first, use the balanced equation to find the mole ratio, then calculate the concentration or volume asked for. Always check your ratio against the equation: 1:1 is common but not universal.
If a question needs a balanced symbol equation as a step in a calculation, balance it before doing any maths. An unbalanced equation invalidates mole ratios and atom economy working, even if your arithmetic afterwards is perfect.
Every equation you write for a mark should include (s), (l), (g), (aq) where relevant. Examiners specifically flag missing state symbols as a common way students lose marks they didn't need to.
For 'compare' or 'evaluate' questions, write a short plan first: one point for each side, then a linking sentence, then a conclusion that actually answers the question asked. Markers reward a complete, organised answer with a clear judgement over a long unstructured one.
The errors examiners see most on this paper. Each one is an easy mark you already know how to keep.
Forgetting to balance the equation before calculating atom economy or percentage yield → Balance the symbol equation first, every time. Write it out, count atoms, then start the calculation.
Mixing up cathode and anode products in electrolysis of aqueous solutions → Learn the rule as a pair: cathode gets hydrogen unless the metal is less reactive than hydrogen; anode gets oxygen unless a halide ion is present.
Leaving out state symbols in equations → Add (s), (l), (g), (aq) to every species in every equation you write for marks. It costs nothing and is explicitly credited.
Using cm³ instead of dm³ in mole calculations from concentration → Always convert cm³ to dm³ by dividing by 1000 before using moles = concentration × volume.
Describing metallic bonding as 'strong bonds between metal atoms' without mentioning delocalised electrons → Always name the delocalised electrons and the electrostatic attraction between them and the positive metal ions. That's where the marks are.
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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