OCR A-Level Chemistry AS Depth in chemistry (02), June 2018
Every question from OCR A-Level Chemistry AS Depth in chemistry (02), June 2018 (H032): 7 questions, 70 marks, each with its mark scheme and topic.
- Question 1 13 marks
Perform calculations and analysis based on a titration of a weak acid with sodium hydroxide, including determining the molar mass and structure of the acid.
Module 1: Development of practical skills in chemistry · Module 2: Foundations in chemistry · Practical Activity Groups · Module 4: Core organic chemistry · PAG 2: Acid-base titration · 2.1 Atoms and reactions · 4.2 Alcohols, haloalkanes and analysis
- Question 2 8 marks
Draw a dot-and-cross diagram for sodium sulfide, complete a table comparing properties of sodium sulfide, sodium, and sulfur, write the electron configuration of selenium, and identify the gas produced when sodium selenide reacts with hydrochloric acid along with its equation.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · 2.2 Electrons, bonding and structure · 3.1 The periodic table
- Question 3 12 marks
Answer questions about the halogens, including ionic equations, explaining reactivity trends, disproportionation using oxidation numbers, calculating bond enthalpy, and enthalpy of vaporisation.
Module 3: Periodic table and energy · Module 2: Foundations in chemistry · Module 5: Physical chemistry and transition elements · 3.1 The periodic table · 2.1 Atoms and reactions · 3.2 Physical chemistry
- Question 4 12 marks
Calculate the energy released from converting 5.10 tonnes of ammonia, write an equilibrium constant expression, and predict the conditions for a maximum yield of nitrogen monoxide with LE Chatelier's principle and compromise factors.
Module 2: Foundations in chemistry · Module 5: Physical chemistry and transition elements · Module 3: Periodic table and energy · 2.1 Atoms and reactions · 3.2 Physical chemistry
- Question 5 10 marks
Describe the preparation, purification, and percentage yield calculation of 1-bromobutane from butan-1-ol, and determine the rate of reaction from a concentration-time graph.
Module 1: Development of practical skills in chemistry · Module 2: Foundations in chemistry · Module 4: Core organic chemistry · Module 5: Physical chemistry and transition elements · Practical Activity Groups · PAG 5: Synthesis of an organic liquid · PAG 9: Rates of reaction – continuous monitoring method · 2.1 Atoms and reactions · 4.2 Alcohols, haloalkanes and analysis · 5.1 Rates, equilibrium and pH
- Question 6 9 marks
Analyze reactions of compound C (1,1-dichloroethene) including hydration, electrophilic addition of bromine, and addition polymerisation.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 7 6 marks
Determine the structure of the trans stereoisomer compound F using its percentage composition, infrared spectrum, and mass spectrum data.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.3 Analysis