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Chemistry · AQA 7405 · Paper 1 · June 2025

AQA A Level Chemistry Paper 1 June 2025 mark scheme 7405/1

2h 105 marks

Materials
Data booklet

Practise the past exam questions by topic

Group 2: the alkaline earth metals15 Qs Group 7: the halogens17 Qs Sub-shells, orbitals & electron configuration16 Qs Coloured transition metal ions7 Qs +22 more
8 questions
  1. Q1 - 11 marks - Group 2: the alkaline earth metals, Group 7: the halogens
  2. Q2 - 8 marks - Sub-shells, orbitals and electron configuration
  3. Q3 - 23 marks - Coloured transition metal ions, Ligand substitution reactions, Metal-aqua ions in solution, Shapes of complex ions, Sub-shells, orbitals and electron configuration, Transition metals, Variable oxidation states of transition metals
  4. Q4 - 12 marks - Bond energy calculations, Enthalpy changes, Entropy and Gibbs free energy, Hess's law, The effect of changing conditions on equilibrium, Transition metal catalysts
  5. Q5 - 10 marks - Group 7: the halogens, Oxidation states, Shapes of molecules and ions
  6. Q6 - 9 marks - Chemical cells and batteries
  7. Q7 - 15 marks - Crystal structures and physical properties, Electrode potentials and electrochemical cells, Isotopes and relative atomic mass, Metal-aqua ions in solution, Oxidation states, Periodicity and Period 3 trends, Transition metal catalysts
  8. Q8 - 17 marks - Buffer solutions, pH calculations, pH curves and indicators, Weak acids and Ka