AQA A-Level Chemistry Paper 3, 2017
Every question from AQA A-Level Chemistry Paper 3, 2017: 34 questions, 90 marks, each with its mark scheme and topic.
- Question 1 14 marks
Determine the enthalpy change for the hydration of magnesium chloride using Hess's law, describe a calorimetry experiment to find its enthalpy of solution, and calculate entropy change from a Gibbs free-energy graph.
Physical Chemistry · Required Practicals · 3.1.4 Energetics · 3.1.8 Thermodynamics · Required Practical 2: Measurement of an enthalpy change
- Question 2 19 marks
Outline the reactions of concentrated sulfuric acid with alkenes, alcohols, and solid sodium halides, including mechanisms, stereoisomerism, and redox observations.
Organic Chemistry · Inorganic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.4 Alkenes · 3.3.5 Alcohols · 3.2.3 Group 7(17), The Halogens
- Question 3 18 marks
Describe the alkaline hydrolysis of ethyl benzoate to produce benzoic acid, including calculations of excess reagents and percentage yield, safety considerations, solubility explanations, and the recrystallisation purification method.
Organic Chemistry · Physical Chemistry · Required Practicals · 3.3.9 Carboxylic Acids and Derivatives · 3.1.2 Amount of Substance · 3.1.3 Bonding · Required Practical 12: Separation and purification techniques
- Question 4 9 marks
Analyse a weak acid-strong base titration curve to deduce indicator range, calculate acid concentration, initial pH, half-neutralisation pH, and complete the plotted titration curve.
Physical Chemistry · Required Practicals · 3.1.12 Acids and Bases · 3.1.2 Amount of Substance · Required Practical 9: Investigate how pH changes when a weak acid reacts with a strong base and when a strong acid reacts with a weak base
- Question 5 1 mark
Identify which compound has the highest boiling point among propan-1-ol, propanal, propanone, and methyl ethanoate.
Physical Chemistry · Organic Chemistry · 3.1.3 Bonding · 3.3.5 Alcohols
- Question 6 1 mark
Identify the correct order of melting points for the Period 3 elements sulfur, phosphorus, chlorine, and argon.
Inorganic Chemistry · Physical Chemistry · 3.2.1 Periodicity · 3.1.3 Bonding
- Question 7 1 mark
Identify which statement about transition metals and complexes is incorrect.
Inorganic Chemistry · 3.2.5 Transition Metals
- Question 8 1 mark
Identify the correct conditions and products for the catalytic cracking of alkanes.
Organic Chemistry · 3.3.2 Alkanes
- Question 9 1 mark
Calculate the concentration of hydrogen ions in a solution of a weak monoprotic acid given its acid dissociation constant (Ka).
Physical Chemistry · 3.1.12 Acids and Bases
- Question 10 1 mark
Calculate the pH of a 0.46 mol dm⁻³ potassium hydroxide solution at 298 K using the ionic product of water, Kw.
Physical Chemistry · 3.1.12 Acids and Bases
- Question 11 1 mark
Calculate the mass in mg of carbon formed when 3.0 × 10⁻³ mol of propene undergoes incomplete combustion according to the given equation.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 12 1 mark
Identify which compound corresponds to the given infrared spectrum showing a strong absorption at approximately 1720 cm⁻¹ and no broad O–H peak.
Organic Chemistry · 3.3.6 Organic Analysis · 3.3.8 Aldehydes and Ketones
- Question 13 1 mark
Identify which pair of reacting compounds does not produce a racemic mixture.
Organic Chemistry · 3.3.7 Optical Isomerism · 3.3.4 Alkenes · 3.3.8 Aldehydes and Ketones
- Question 14 1 mark
Identify which reaction step in a multi-stage synthesis occurs by nucleophilic substitution.
Organic Chemistry · 3.3.3 Halogenoalkanes
- Question 15 1 mark
Identify which square planar platinum complex represents a stereoisomer of the anti-cancer drug cisplatin.
Inorganic Chemistry · Organic Chemistry · 3.2.5 Transition Metals · 3.3.13 Amino Acids, Proteins and DNA
- Question 16 1 mark
Identify which letter represents the most probable energy of gas molecules at the higher temperature on a Maxwell–Boltzmann distribution graph.
Physical Chemistry · 3.1.5 Kinetics
- Question 17 1 mark
Identify the step in the Contact Process in which the vanadium catalyst is oxidised.
Inorganic Chemistry · Physical Chemistry · 3.2.5 Transition Metals · 3.1.7 Oxidation, Reduction and Redox Equations
- Question 18 1 mark
Identify which pair of alkene monomers could produce the given random addition copolymer structure.
Organic Chemistry · 3.3.4 Alkenes
- Question 19 1 mark
Calculate the minimum mass in mg of zinc needed to react completely with 50.0 cm³ of 1.68 mol dm⁻³ hydrochloric acid.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 20 1 mark
Identify which property increases when the temperature of the exothermic equilibrium between carbon monoxide, chlorine, and phosgene is decreased.
Physical Chemistry · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc · 3.1.10 Equilibrium Constant Kp
- Question 21 1 mark
Identify which curly arrow does not appear in the mechanism for the reaction of propanone with hydroxide ions to form an enolate ion.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.8 Aldehydes and Ketones
- Question 22 1 mark
Identify which point on a titration curve for a strong alkali added to a weak acid represents a solution that can act as a buffer.
Physical Chemistry · 3.1.12 Acids and Bases
- Question 23 1 mark
Identify which alcohol cannot be produced by the reduction of an aldehyde or a ketone.
Organic Chemistry · 3.3.5 Alcohols · 3.3.8 Aldehydes and Ketones · 3.3.1 Introduction to Organic Chemistry
- Question 24 1 mark
Identify which compound among four chlorinated propane and propene derivatives does not exhibit stereoisomerism.
Organic Chemistry · 3.3.1 Introduction to Organic Chemistry · 3.3.7 Optical Isomerism
- Question 25 1 mark
Identify which compound can form a condensation polymer on its own without requiring another reagent.
Organic Chemistry · 3.3.9 Carboxylic Acids and Derivatives · 3.3.12 Polymers
- Question 26 1 mark
Calculate the concentration of chloride ions in a solution containing a given mass of lead(II) chloride.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 27 1 mark
Calculate the new pH of a reaction mixture when the rate of an acid-catalysed reaction decreases to one quarter of its original value.
Physical Chemistry · 3.1.9 Rate Equations · 3.1.12 Acids and Bases
- Question 28 1 mark
Calculate the mole fraction of carbon dioxide when a 385 cm³ sample at 100 kPa and 25 °C is mixed with argon.
Physical Chemistry · 3.1.2 Amount of Substance · 3.1.10 Equilibrium Constant Kp
- Question 29 1 mark
Determine the number of peaks in the 13C NMR spectrum of benzo[b]thiophene.
Organic Chemistry · 3.3.15 Nuclear Magnetic Resonance Spectroscopy
- Question 30 1 mark
Calculate the volume of water needed to dilute 5.00 cm³ of 1.00 mol dm⁻³ ammonia solution to a concentration of 0.050 mol dm⁻³.
Physical Chemistry · 3.1.2 Amount of Substance
- Question 31 1 mark
Identify which aqueous transition metal ion is present in a solution that absorbs light with wavelengths corresponding to red, yellow, and green.
Inorganic Chemistry · 3.2.5 Transition Metals · 3.2.6 Reactions of Ions in Aqueous Solution
- Question 32 1 mark
Determine the conditions under which an exothermic reaction with a negative entropy change is feasible.
Physical Chemistry · 3.1.8 Thermodynamics
- Question 33 1 mark
Calculate the mass of phenylethanone produced given the mass of ethanoyl chloride reacting with excess benzene and a 62% yield.
Physical Chemistry · Organic Chemistry · 3.1.2 Amount of Substance · 3.3.10 Aromatic Chemistry
- Question 34 1 mark
Calculate the pressure of a mixture of oxygen and nitrogen gas when placed into an evacuated flask of known volume at constant temperature.
Physical Chemistry · 3.1.2 Amount of Substance