AQA Chemistry Paper 2

AQA Chemistry Paper 2 Higher Combined Science Predicted Paper 2022 Name ……………………………………………… Date ……………………………………………… 1 hour 15 minutes allowed Similar to your real exam, each question in this gets harder towards the end of each question, so if you find you can’t do the last part of a certain question, try the next question – they all start off easier then get harder. Grade boundaries These are VERY rough guesses! Getting a 5 or 4 on this paper does not guarantee you the same mark in the exam. • 9 55 • 8 45 • 7 35 • 6 25 • 5 15 The information from the exam board gives us a broad overview of what is covered in the exam. If a topic is not listed as a ‘major focus’ it can still come up in a question, but that question might not be worth many marks. There are questions in this paper that cover topics that are not a ‘major focus’ for the exam, but don’t let that worry you! Exam Analysis Question Marks available Marks gained Topic Advanced information for 2022 What do you need to do to improve? 1 9 Chromatography Purity, formulations and chromatography and Required Practical Activity 12 2 12 Earth’s early atmosphere The composition and evolution of the earth’s atmosphere 3 20 Rates of reaction Rate of reaction and Required Practical Activity 11 4 13 Crude oil Carbon compounds as fuels and feedstock 5 7 Potable water Using the earth’s resources and obtaining potable water 6 9 Reversible reactions Reversible reactions and dynamic equilibrium Total 70 Question 1 a) Chromatography can be used to separate out solutions. Describe how. (4 marks) …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… b) Determine the Rf value of spot B on the chromatogram below. Rf= distance moved by substance Distance moved by solvent (3 marks) …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… c) State if the original substance was pure or a mixture. (1 mark) …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… d) Suggest what the origin line could have been drawn in. (1 mark) …………………………………………………………………………………………………………………………………………… …………………………………………………