AQA A-Level Chemistry Paper 1, 2018
Every question from AQA A-Level Chemistry Paper 1, 2018: 10 questions, 105 marks, each with its mark scheme and topic.
- Question 1 6 marks
Complete the Born–Haber cycle for magnesium oxide and calculate its enthalpy of lattice formation using given thermodynamic data.
Physical Chemistry · 3.1.8 Thermodynamics
- Question 2 9 marks
Calculate the partial pressures, write the expression for Kp, determine the value and units of Kp, and explain the effect of temperature on Kp for the Haber process equilibrium.
Physical Chemistry · 3.1.10 Equilibrium Constant Kp · 3.1.6 Chemical Equilibria, Le Chatelier's Principle and Kc
- Question 3 11 marks
Calculate the entropy and Gibbs free-energy changes for the oxidation of ammonia, explain the effect of temperature, describe heterogeneous catalysis by platinum, and determine oxidation state changes.
Physical Chemistry · Inorganic Chemistry · 3.1.8 Thermodynamics · 3.1.5 Kinetics · 3.1.7 Oxidation, Reduction and Redox Equations · 3.1.2 Amount of Substance · 3.2.5 Transition Metals
- Question 4 18 marks
Answer questions on s-block metals including electron configuration, ionisation energy comparisons, Group 2 hydroxide solubility, precipitation stoichiometry, isotopic abundance, and TOF mass spectrometry calculations.
Physical Chemistry · Inorganic Chemistry · 3.1.1 Atomic Structure · 3.1.2 Amount of Substance · 3.2.1 Periodicity · 3.2.2 Group 2, The Alkaline Earth Metals
- Question 5 15 marks
Define a strong acid, calculate the pH of a mixture of hydrochloric acid and barium hydroxide, explain why water at 30 °C is neutral, identify an acidic Period 3 oxide, write the Ka expression for ethanoic acid, and calculate the pH of an ethanoic acid/sodium ethanoate buffer after addition of hydrochloric acid.
Physical Chemistry · Inorganic Chemistry · 3.1.12 Acids and Bases · 3.2.4 Properties of Period 3 Elements and Their Oxides
- Question 6 6 marks
Analyze a copper concentration cell to explain the role of a salt bridge, calculate the left-hand electrode potential, write conventional cell notation, and explain concentration changes during discharge.
Physical Chemistry · 3.1.11 Electrode Potentials
- Question 7 9 marks
Write equations and state observations for the reactions of aqueous hexaaquaaluminium(III) ions with water, sodium carbonate, and excess potassium hydroxide.
Inorganic Chemistry · Physical Chemistry · 3.2.6 Reactions of Ions in Aqueous Solution · 3.1.12 Acids and Bases
- Question 8 17 marks
Explain differences in melting point between NaBr, Na, and NaI; calculate gas volume and ion concentration from sodium reacting with water; and determine the shape and bond angle of the NH₂⁻ ion.
Physical Chemistry · 3.1.2 Amount of Substance · 3.1.3 Bonding
- Question 9 7 marks
Use electrode potential data to identify a reducing agent for vanadium ions, determine an oxidation state, draw complex isomers, and write equations involving vanadium compounds and catalysis.
Physical Chemistry · Inorganic Chemistry · 3.1.7 Oxidation, Reduction and Redox Equations · 3.1.11 Electrode Potentials · 3.2.5 Transition Metals · 3.1.2 Amount of Substance
- Question 10 7 marks
Calculate the value of x in hydrated sodium carbonate using back-titration data.
Physical Chemistry · Required Practicals · 3.1.2 Amount of Substance · Required Practical 1: Making up a volumetric solution