Edexcel A-Level Chemistry Paper 3, June 2018
Every question from Edexcel A-Level Chemistry Paper 3, June 2018 (9CH0): 8 questions, 120 marks, each with its mark scheme and topic.
- Question 1 10 marks
Describe the formation of London forces, explain the boiling point trend between chlorine and bromine, and describe displacement experiments to determine the reactivity of halogens.
Physical Chemistry · Inorganic Chemistry · Topic 2: Bonding and Structure · Topic 4: Inorganic Chemistry and the Periodic Table
- Question 2 9 marks
Devise a two-step synthesis of lactic acid starting from ethanal, and identify the type of polymerisation and repeat unit for poly(lactic acid).
Organic Chemistry · Topic 17: Organic Chemistry II · Topic 18: Organic Chemistry III
- Question 3 18 marks
Identify an unknown Group 2 carbonate by measuring the volume of carbon dioxide evolved in a reaction with nitric acid and by thermal decomposition.
Physical Chemistry · Inorganic Chemistry · Core Practicals · Core Practical 1: Measuring the molar volume of a gas · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance · Topic 9: Kinetics I
- Question 4 13 marks
Deduce structural formulae, explain splitting patterns, and discuss the use of TMS in NMR spectroscopy for isomers of C6H12O2.
Organic Chemistry · Topic 19: Modern Analytical Techniques II · Topic 17: Organic Chemistry II
- Question 5 16 marks
Analyse the properties of transition elements including vanadium oxidation states, reduction reactions with zinc, catalytic action in the contact process, and copper(II) complex ion reactions.
Inorganic Chemistry · Physical Chemistry · Topic 15: Transition Metals · Topic 14: Redox II
- Question 6 24 marks
Analyze an unknown carboxylic acid X with molecular ion peak m/z = 116 using infrared spectroscopy, titration calculations, experimental error analysis, neutralization equations, chemical tests, and E/Z isomerism.
Organic Chemistry · Physical Chemistry · Core Practicals · Core Practical 2: Preparation of a standard solution from a solid acid · Core Practical 3: Find the concentration of a solution of hydrochloric acid · Core Practical 15: Analyse organic and inorganic unknowns · Topic 7: Modern Analytical Techniques I · Topic 6: Organic Chemistry I · Topic 17: Organic Chemistry II · Topic 5: Formulae, Equations and Amounts of Substance
- Question 7 11 marks
Calculate the pH of a buffer solution formed by mixing a weak acid and sodium hydroxide, sketch its titration curve, and explain how to determine Ka from the graph.
Physical Chemistry · Topic 12: Acid-base Equilibria
- Question 8 19 marks
Calculate the equilibrium constant Kc for the esterification reaction between ethanoic acid and propan-1-ol based on titration data and equilibrium amounts.
Physical Chemistry · Topic 10: Equilibrium I · Topic 11: Equilibrium II · Topic 5: Formulae, Equations and Amounts of Substance