OCR A-Level Chemistry AS Depth in chemistry (02), June 2022
Every question from OCR A-Level Chemistry AS Depth in chemistry (02), June 2022 (H032): 6 questions, 70 marks, each with its mark scheme and topic.
- Question 1 15 marks
Calculate the mass of citric acid in a lime using titration results, and write an oxidation equation for malic acid.
Module 1: Development of practical skills in chemistry · Module 2: Foundations in chemistry · Module 4: Core organic chemistry · Practical Activity Groups · PAG 2: Acid-base titration · 2.1 Atoms and reactions · 1.2 Practical skills assessed in the practical endorsement · 4.2 Alcohols, haloalkanes and analysis
- Question 2 9 marks
Write equations, explain redox behaviour, compare reactivity down Group 2 with water, predict pH of barium oxide solution, and describe the reaction of barium hydroxide with dilute sulfuric acid.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 3 12 marks
Investigate the rate of reaction of zinc carbonate with hydrochloric acid using a mass-time graph, collision theory, rate calculation, and enthalpy profile diagrams with catalysts.
Module 3: Periodic table and energy · Module 5: Physical chemistry and transition elements · Practical Activity Groups · 3.2 Physical chemistry · 5.1 Rates, equilibrium and pH · PAG 9: Rates of reaction – continuous monitoring method
- Question 4 15 marks
Explain the industrial conditions for hydrogen manufacture from methane, calculate equilibrium constant Kc, enthalpy change from bond enthalpies, and explain shapes and bond angles of CO2 and H2O.
Module 3: Periodic table and energy · Module 5: Physical chemistry and transition elements · Module 2: Foundations in chemistry · 3.2 Physical chemistry · 5.1 Rates, equilibrium and pH · 5.2 Energy · 2.2 Electrons, bonding and structure
- Question 5 13 marks
Analyze the preparation of 2-bromobutane through radical substitution, electrophilic addition, and nucleophilic substitution reactions involving atom economy, percentage yield calculations, and purification procedures.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · Practical Activity Groups · PAG 5: Synthesis of an organic liquid · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 6 6 marks
Determine the structure of the unsaturated trans stereoisomer compound A using its percentage composition by mass, mass spectrum, and infrared spectrum.
Module 2: Foundations in chemistry · Module 6: Organic chemistry and analysis · Module 4: Core organic chemistry · 2.1 Atoms and reactions · 4.1 Basic concepts and hydrocarbons · 6.3 Analysis