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Chemistry A · OCR H432 · Periodic table, elements and physical chemistry · November 2021

OCR A Level Chemistry A Periodic table, elements and physical chemistry November 2021 examiner report (H432/01)

2h 15m 100 marks

Examiner report

  1. Q1 - 1 mark - Electronegativity and bond polarity
  2. Q2 - 1 mark - Oxidation states
  3. Q3 - 1 mark - Redox equations
  4. Q4 - 1 mark - Amounts of substance in equations
  5. Q5 - 1 mark - Amounts of substance in equations
  6. Q6 - 1 mark - Amounts of substance in equations
  7. Q7 - 1 mark - Ionisation energies
  8. Q8 - 1 mark - Bond energy calculations
  9. Q9 - 1 mark - The effect of changing conditions on equilibrium
  10. Q10 - 1 mark - pH calculations, Weak acids and Ka
  11. Q11 - 1 mark - Entropy and Gibbs free energy
  12. Q12 - 1 mark - Oxidation and reduction in terms of electrons
  13. Q13 - 1 mark - Group 7: the halogens
  14. Q14 - 1 mark - Covalent bonding, Electronegativity and bond polarity, Shapes of molecules and ions
  15. Q15 - 1 mark - Identification of ions
  16. Q16 - 14 marks - Enthalpy of solution and hydration, Ionisation energies, Sub-shells, orbitals and electron configuration
  17. Q17 - 11 marks - Complex ions and ligands, Dative covalent bonds, Empirical formulae, Shapes of complex ions, Transition metals
  18. Q18 - 12 marks - Reactions of acids, Redox titrations, Variable oxidation states of transition metals
  19. Q19 - 11 marks - Electrode potentials and electrochemical cells, Fuel cells, Oxidation and reduction in terms of electrons, Redox equations
  20. Q20 - 11 marks - Entropy and Gibbs free energy, Equilibrium constant Kp, The effect of changing conditions on equilibrium
  21. Q21 - 10 marks - Determining orders of reaction, Rate-determining step and mechanisms, The Arrhenius equation
  22. Q22 - 16 marks - Amounts of substance in equations, Calorimetry, Enthalpy changes, pH calculations