Edexcel A-Level Chemistry Paper 1, November 2020
Every question from Edexcel A-Level Chemistry Paper 1, November 2020 (9CH0): 8 questions, 90 marks, each with its mark scheme and topic.
- Question 1 8 marks
Identify equations for third ionisation energy, deduce group and element positions from ionisation energy tables and trends, determine isoelectronic ion formulae, and discuss why scandium and zinc are d-block elements but not transition metals using electronic configurations.
Physical Chemistry · Inorganic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 15: Transition Metals
- Question 2 6 marks
Assess various concepts in acid-base equilibria including relative pH of acid solutions, calculating pKa from pH and concentration, buffer solutions, and suitable titration indicators.
Physical Chemistry · Topic 12: Acid-base Equilibria
- Question 3 18 marks
Describe chromium bonding and high melting point, chromium(III) complex shape and colour, entropy changes for a ligand substitution equilibrium involving EDTA4-, and calculate the final oxidation state of vanadium in a redox reaction with chlorine.
Physical Chemistry · Inorganic Chemistry · Topic 2: Bonding and Structure · Topic 5: Formulae, Equations and Amounts of Substance · Topic 13: Energetics II · Topic 15: Transition Metals
- Question 4 8 marks
Assess the solubility of Group 2 sulfates, calculate the enthalpy change of solution for magnesium chloride using a Born-Haber / enthalpy cycle, and explain the solubility of 2-methylpentane and potassium bromide in water and hexane based on intermolecular forces.
Physical Chemistry · Inorganic Chemistry · Organic Chemistry · Topic 13: Energetics II · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 2: Bonding and Structure
- Question 5 12 marks
Investigate the thermal decomposition and water of crystallization of hydrated magnesium nitrate through observations, explanations of thermal stability trends, dot-and-cross diagrams, and stoichiometric calculations.
Inorganic Chemistry · Physical Chemistry · Organic Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance · Topic 2: Bonding and Structure
- Question 6 12 marks
Calculate mean bond enthalpies, enthalpy of combustion, entropy changes, and reaction feasibility for prop-2-en-1-ol and a carbon dioxide reduction process.
Physical Chemistry · Organic Chemistry · Topic 8: Energetics I · Topic 13: Energetics II · Topic 6: Organic Chemistry I
- Question 7 8 marks
Calculate the equilibrium amounts for the esterification of ethanoic acid and ethanol, determine bond angles and units of Kp, and explain the effect of pressure on Kp.
Physical Chemistry · Organic Chemistry · Topic 11: Equilibrium II · Topic 2: Bonding and Structure
- Question 8 18 marks
Perform calculations and write equations related to a redox titration of potassium manganate(VII) with sodium ethanedioate, including titration table completion, mass determination, and electrode potential reasoning.
Physical Chemistry · Inorganic Chemistry · Core Practicals · Topic 3: Redox I · Topic 5: Formulae, Equations and Amounts of Substance · Topic 14: Redox II · Topic 15: Transition Metals · Core Practical 3: Find the concentration of a solution of hydrochloric acid · Topic 2: Bonding and Structure