Edexcel A-Level Chemistry Paper 3, June 2023
Every question from Edexcel A-Level Chemistry Paper 3, June 2023 (9CH0): 10 questions, 120 marks, each with its mark scheme and topic.
- Question 1 7 marks
Complete combustion and incomplete combustion equations, environmental impacts of sulfur impurities, and reforming reactions of alkanes.
Organic Chemistry · Topic 6: Organic Chemistry I
- Question 2 11 marks
Describe and explain the reactions, trends, solubility, and thermal decomposition of Group 1 and Group 2 compounds, including oxidation number changes.
Inorganic Chemistry · Physical Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 3: Redox I
- Question 3 11 marks
Write the dehydration equation for ethanol, draw the dot-and-cross diagram for sulfuric acid, and analyse the experimental setup for dehydrating ethanol over aluminium oxide including gas calculations.
Organic Chemistry · Physical Chemistry · Core Practicals · Topic 2: Bonding and Structure · Topic 5: Formulae, Equations and Amounts of Substance · Topic 6: Organic Chemistry I
- Question 4 10 marks
Devise an experimental procedure to determine the enthalpy change of solution for hydrated magnesium sulfate, calculate the enthalpy change of hydration using Hess's law, and explain the difference in enthalpy of hydration between magnesium and calcium ions.
Physical Chemistry · Core Practicals · Core Practical 8: Determine the enthalpy change of a reaction using Hess’s law · Topic 8: Energetics I · Topic 13: Energetics II
- Question 5 12 marks
Construct electrochemical cells, use electrode potentials to determine reaction feasibility, and explain electron flow and redox processes in a hydrogen-oxygen fuel cell.
Physical Chemistry · Core Practicals · Core Practical 10: Construct electrochemical cells and measure electrode potentials · Topic 14: Redox II
- Question 6 7 marks
Analyze amino acids using two-way chromatography, identify reagents for visualization, and state the technique used alongside gas chromatography in forensics.
Organic Chemistry · Core Practicals · Topic 19: Modern Analytical Techniques II · Topic 18: Organic Chemistry III
- Question 7 19 marks
Calculate the permanent and temporary hardness of a water sample in mg dm-3 using titration data with EDTA and buffer preparation calculations.
Physical Chemistry · Inorganic Chemistry · Organic 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 11: Find the amount of iron in an iron tablet using redox titration · Topic 15: Transition Metals · Topic 12: Acid-base Equilibria · Topic 5: Formulae, Equations and Amounts of Substance · Topic 2: Bonding and Structure
- Question 8 13 marks
Deduce experimental techniques, write rate equations, sketch Maxwell-Boltzmann distributions, and use the Arrhenius equation to determine activation energy and calculate the effect of temperature and catalysts on reaction rates.
Physical Chemistry · Core Practicals · Core Practical 13b: Use a clock reaction to determine a rate equation · Topic 9: Kinetics I · Topic 16: Kinetics II
- Question 9 15 marks
Deduce structures of isomers of C8H8O2, write equations for ester hydrolysis, complete an electrophilic substitution mechanism involving an acyl chloride and phenol, and distinguish between two organic compounds using chemical tests.
Organic Chemistry · Topic 17: Organic Chemistry II · Topic 18: Organic Chemistry III · Topic 19: Modern Analytical Techniques II
- Question 10 15 marks
Calculate entropy changes, Gibbs free energy sign, and Kp for reactions involved in the Mond Process of nickel purification, and explain entropy changes qualitatively.
Physical Chemistry · Inorganic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 11: Equilibrium II · Topic 13: Energetics II · Topic 15: Transition Metals