Edexcel A-Level Chemistry Paper 3, June 2022
Every question from Edexcel A-Level Chemistry Paper 3, June 2022 (9CH0): 10 questions, 120 marks, each with its mark scheme and topic.
- Question 1 4 marks
Define relative atomic mass and calculate the relative atomic mass of a sample of neon given its isotopic percentage abundances.
Physical Chemistry · Topic 1: Atomic Structure and the Periodic Table
- Question 2 12 marks
Explain the colour, octahedral shape, and crystallisation steps of ammonium cobalt(II) sulfate complex ions, and identify reasons for a percentage yield of less than 100%.
Inorganic Chemistry · Physical Chemistry · Topic 15: Transition Metals · Topic 2: Bonding and Structure
- Question 3 13 marks
Deduce the formulae of two salts X and Y using qualitative tests, and determine the number of moles of water of crystallisation in Y using stoichiometry and experimental analysis.
Inorganic Chemistry · Physical Chemistry · Core Practicals · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance · Core Practical 7: Identify unknown organic liquids and inorganic solids
- Question 4 13 marks
Calculate entropy changes and feasibility temperatures for barium carbonate decomposition, compare thermal stabilities of group 2 carbonates, and evaluate a test for carbonate ions using sulfuric acid.
Physical Chemistry · Inorganic Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 13: Energetics II
- Question 5 6 marks
Explain the difference in the reactivity of bromine with benzene and with phenol, including the type of reaction, products formed, and conditions required.
Organic Chemistry · Topic 18: Organic Chemistry III
- Question 6 11 marks
Determine the empirical formula of ester Q from combustion data and deduce its full structure using high-resolution proton NMR data.
Organic Chemistry · Physical Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 19: Modern Analytical Techniques II
- Question 7 21 marks
Synthesise methyl methacrylate via a multi-step reaction scheme starting from propanone, draw the reaction mechanism, describe the laboratory distillation apparatus, and explain the steps in the purification and identification of organic compounds.
Organic Chemistry · Core Practicals · Topic 17: Organic Chemistry II · Topic 18: Organic Chemistry III · Core Practical 7: Identify unknown organic liquids and inorganic solids · Core Practical 15: Analyse organic and inorganic unknowns · Topic 6: Organic Chemistry I
- Question 8 14 marks
Devise an experiment to determine the acid dissociation constant of ethanoic acid using a pH meter and sodium hydroxide, calculate volumes for a buffer solution of a given pH, and calculate the pH of a mixture of sodium hydroxide and sulfuric acid.
Physical Chemistry · Core Practicals · Core Practical 9: Finding the Ka value for a weak acid · Topic 12: Acid-base Equilibria
- Question 9 14 marks
Analyze the acid-base titration of citric acid in pineapple juice, redox titration of ascorbic acid using potassium iodate, and the identification of interfering compounds containing carboxylic acid groups.
Physical Chemistry · Organic Chemistry · Inorganic Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 12: Acid-base Equilibria · Topic 3: Redox I · Topic 6: Organic Chemistry I · Topic 17: Organic Chemistry II
- Question 10 12 marks
Follow the rate of the iodine-propanone reaction using a titrimetric method, plot the data, determine the order with respect to iodine, and deduce the rate-determining step and catalyst role.
Core Practicals · Physical Chemistry · Core Practical 13a: Follow the rate of the iodine-propanone reaction by a titrimetric method · Topic 16: Kinetics II