AQA A-Level Chemistry Paper 2Predicted Paper 2023 questions and answers – Organic and Physical Chemistry

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AQA A-Level Chemistry Paper 2 – Organic and Physical Chemistry Predicted Paper 2023 Name …………………………………………………………………… Date ………………... … 2 hours allowed You should have access to the AQA insert (periodic table and data sheet) to help with answering the questions. Grade boundaries These are VERY rough guesses! Getting a C on this paper does not guarantee you the same mark in the exam. • A* - 90 • A – 80 • B – 70 • C – 60 • D – 50 • E - 40 01 Esters have many important commercial uses such as solvents and artificial flavorings in food. A mixture was prepared using 2.00 mol of CH3COOH, 3.00 mol of methanol and 7.00 mol of water. The mixture was left to reach equilibrium according to the following equation at T1. CH3COOH + CH3OH ⇌ CH3COOCH3+ H2O ΔH = -50 kJ/mol The equilibrium mixture contains 0.85 moles of the ester. 01.1 Write an expression for the equilibrium constant Kc for this reaction. [1 mark] 01.2 Calculate the value of Kc. Explain why this Kc value has no units [Show More]

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