All papers

Chemistry A · OCR H432 · Unified chemistry · June 2019

OCR A Level Chemistry A Unified chemistry June 2019 examiner report (H432/03)

1h 30m 70 marks

Examiner report

  1. Q1 - 9 marks - Amounts of substance in equations, Electronegativity and bond polarity, Equilibrium constant Kp, Moles and amount of substance, pH calculations, Rate equations and orders of reaction
  2. Q2 - 8 marks - Bronsted-Lowry acids and bases, Organic synthesis routes, Oxidation of alcohols, Percentage yield
  3. Q3 - 10 marks - Atoms, elements and compounds, Empirical formulae, Moles and amount of substance
  4. Q4 - 18 marks - Benzene and aromatic chemistry, E-Z isomerism, NMR spectroscopy, Optical isomerism, Organic synthesis routes, pH calculations, Tests for organic functional groups, Weak acids and Ka
  5. Q5 - 13 marks - Calorimetry, Entropy and Gibbs free energy, Hess's law, Shapes of molecules and ions
  6. Q6 - 12 marks - Amounts of substance in equations, Empirical formulae, Metal-aqua ions in solution, Oxidation and reduction in terms of electrons, Redox equations, Variable oxidation states of transition metals