Edexcel A-Level Chemistry AS Paper 2, November 2021
Every question from Edexcel A-Level Chemistry AS Paper 2, November 2021 (8CH0): 9 questions, 80 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify the type of isomerism shown by two given alkene structures.
Organic Chemistry · Topic 6: Organic Chemistry I
- Question 2 7 marks
Complete a Hess's Law cycle, calculate the enthalpy change of thermal decomposition of PCl5 using given formation and vaporisation enthalpy data, and explain the effect of increasing temperature on an equilibrium position.
Physical Chemistry · Topic 8: Energetics I · Topic 10: Equilibrium I
- Question 3 1 mark
Identify which Maxwell-Boltzmann distribution shows the effect of adding a catalyst to a reaction at the same temperature and pressure.
Physical Chemistry · Topic 9: Kinetics I
- Question 4 10 marks
Write a reaction equation for the thermal decomposition of calcium sulfate dihydrate, identify reaction terms, calculate water volume needed for hydration, determine enthalpy change from calorimetric data, and calculate percentage uncertainties.
Physical Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 8: Energetics I
- Question 5 7 marks
Write an equation for the incomplete combustion of methane, explain the formation of acidic sulfur and nitrogen oxides from fossil fuels, discuss why flue gas desulfurisation is an incomplete solution due to carbon dioxide production, and draw a dot-and-cross diagram for sulfur dioxide.
Physical Chemistry · Organic Chemistry · Inorganic Chemistry · Topic 6: Organic Chemistry I · Topic 2: Bonding and Structure · Topic 4: Inorganic Chemistry and the Periodic Table
- Question 6 14 marks
Calculate the rate of reaction at 50 s from a concentration-time graph, identify the mechanism of halogenoalkane hydrolysis, determine the relative rates of hydrolysis for different halogenoalkanes, state reagents for elimination, draw a polymer repeat unit, and draw the electrophilic addition mechanism for hydrogen bromide to 2-methylpropene.
Organic Chemistry · Core Practicals · Physical Chemistry · Topic 6: Organic Chemistry I · Topic 9: Kinetics I · Core Practical 4: Investigate the hydrolysis of halogenoalkanes
- Question 7 4 marks
State the definition of a homologous series and explain why methanol is soluble in water in all proportions using a diagram.
Physical Chemistry · Organic Chemistry · Topic 2: Bonding and Structure · Topic 6: Organic Chemistry I
- Question 8 19 marks
Analyze reactions of cyclohexanol, including its oxidation to cyclohexanone, dehydration to cyclohexene, substitution reactions, IR and mass spectrometry, percentage yield calculations, and preparation/purification procedures.
Organic Chemistry · Core Practicals · Physical Chemistry · Core Practical 5: Investigate the oxidation of ethanol · Core Practical 7: Identify unknown organic liquids and inorganic solids · Topic 5: Formulae, Equations and Amounts of Substance · Topic 6: Organic Chemistry I · Topic 7: Modern Analytical Techniques I
- Question 9 17 marks
Calculate the enthalpy change for the formation of ammonia using mean bond enthalpies, determine atom economy, identify Kc expressions, and explain heterogeneous catalysis and equilibrium removal.
Physical Chemistry · Organic Chemistry · Inorganic Chemistry · Topic 5: Formulae, Equations and Amounts of Substance · Topic 8: Energetics I · Topic 9: Kinetics I · Topic 10: Equilibrium I · Topic 11: Equilibrium II