AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2022
Every question from AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2022: 6 questions, 70 marks, each with its mark scheme and topic.
- Question 1 10 marks
Identify errors in a paper chromatography setup, draw conclusions from chromatogram results, explain why a dye did not move, and calculate solvent distance using an Rf value.
Chemistry · Required Practicals · C8: Chemical Analysis · Chemistry Required Practicals
- Question 2 10 marks
Compare how potable water is obtained from waste water and ground water, identify the process used to obtain potable water from salt water, and calculate the concentration of sodium chloride in g/dm³.
Chemistry · C10: Using Resources · C3: Quantitative Chemistry
- Question 3 12 marks
Answer questions about the rate of reaction between sodium thiosulfate and hydrochloric acid, including explaining mass loss, identifying variables, plotting data, calculating a tangent gradient, and explaining why rate decreases.
Chemistry · Required Practicals · C6: The Rate and Extent of Chemical Change · Chemistry Required Practicals
- Question 4 12 marks
Name and define hydrocarbons, complete a cracking equation, explain why cracking products are in demand, and evaluate the sustainability of wooden versus plastic window frames using life cycle assessment data.
Chemistry · C7: Organic Chemistry · C10: Using Resources
- Question 5 16 marks
Explain changes in nitrogen and oxygen in Earth's atmosphere, describe coal formation and copper extraction by bioleaching, suggest why coal produces more carbon dioxide than natural gas, and calculate ash mass from phytomining data.
Chemistry · C9: Chemistry of the Atmosphere · C10: Using Resources
- Question 6 10 marks
Answer a series of short questions about catalysts, reversible reactions, dynamic equilibrium, and the effects of pressure and temperature on the Haber process for producing ammonia.
Chemistry · C6: The Rate and Extent of Chemical Change