A-LevelChemistryChemical energeticsMay/June 2022Paper 3 Q216 Marks
In Question 1 you carried out a neutralisation reaction involving sodium hydroxide. H+(aq) + OH-(aq) → H₂O(I) In Question 2 you are to determine the enthalpy of neutralisation, ∆H_neut, as shown by the equation above. You will use a solution of sodium hydroxide and the diprotic acid, sulfuric acid. FB 4 is approximately 2 mol dm-³ sodium hydroxide, NaOH. FB 5 is 1.00 mol dm-³ sulfuric acid, H2SO4.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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