OCR A-Level Chemistry Unified chemistry (03), June 2024
Every question from OCR A-Level Chemistry Unified chemistry (03), June 2024 (H432): 5 questions, 70 marks, each with its mark scheme and topic.
- Question 1 10 marks
Calculate pH values of strong base, diluted strong acid, and buffer solutions, and describe the preparation of a standard solution.
Module 5: Physical chemistry and transition elements · Module 2: Foundations in chemistry · Practical Activity Groups · 5.1 Rates, equilibrium and pH · 2.1 Atoms and reactions · PAG 2: Acid-base titration
- Question 2 14 marks
Calculate bond enthalpy, energy released in gas reactions, determine the formula of a chloride from titration data, and deduce molecular formula and structural features of an organic antiviral molecule.
Module 3: Periodic table and energy · Module 4: Core organic chemistry · Module 2: Foundations in chemistry · 3.1 The periodic table · 3.2 Physical chemistry · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons
- Question 3 17 marks
Analyze optical isomerism of an iron(III) ethanedioate complex, write oxidation half-equations, complete a titration table, calculate percentage uncertainty, and determine the formula of hydrated iron(II) ethanedioate using titration data.
Module 5: Physical chemistry and transition elements · Module 2: Foundations in chemistry · Practical Activity Groups · 5.3 Transition elements · 2.1 Atoms and reactions · PAG 2: Acid-base titration
- Question 4 16 marks
Answer questions about the chemistry of compounds containing phosphorus, including acid-base equilibria, redox reactions with phosphine, systematic naming, bond angles and structures, percentage composition, and evidence for molecular structure.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · Module 6: Organic chemistry and analysis · 6.1 Aromatic compounds, carbonyls and acids · 3.1 The periodic table · 2.1 Atoms and reactions
- Question 5 13 marks
Analyze the alkaline hydrolysis of halogenoalkanes using TLC and deduce the structures of isomers F to I using test-tube reactions.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.2 Alcohols, haloalkanes and analysis · 6.1 Aromatic compounds, carbonyls and acids · 6.3 Analysis