Edexcel A-Level Chemistry AS Paper 1, November 2020
Every question from Edexcel A-Level Chemistry AS Paper 1, November 2020 (8CH0): 8 questions, 80 marks, each with its mark scheme and topic.
- Question 1 3 marks
Identify the electronic configuration of the arsenide ion and explain the meaning of opposing and parallel spins in electron box diagrams for phosphorus.
Physical Chemistry · Topic 1: Atomic Structure and the Periodic Table
- Question 2 7 marks
Identify equations and successive ionisation energy trends, complete a first ionisation energy trend graph for Period 3 elements, and deduce electron shells from a log successive ionisation energy graph of sodium.
Physical Chemistry · Topic 1: Atomic Structure and the Periodic Table
- Question 3 9 marks
Explain covalent bonding, draw a dot-and-cross diagram, estimate bond angles, explain solubility through hydrogen bonding, and give reasons for hydrazine acting as a rocket fuel.
Physical Chemistry · Topic 2: Bonding and Structure
- Question 4 12 marks
Calculate the relative atomic mass of potassium from isotopic data and explain the principles and operation of a mass spectrometer including ion pathways and vacuum requirements.
Physical Chemistry · Organic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 7: Modern Analytical Techniques I
- Question 5 12 marks
Assess various properties, reactions, and trends of halogens and halide ions including displacement, redox reactions with sulfuric acid, preparation of potassium iodate(V), testing for iodide, and boiling point trends.
Inorganic Chemistry · Physical Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 3: Redox I
- Question 6 20 marks
Calculate the percentage purity of malachite, determine the volume of carbon dioxide produced using the ideal gas equation, and explain flame tests and electron transitions.
Physical Chemistry · Inorganic Chemistry · Core Practicals · Topic 1: Atomic Structure and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance · Topic 4: Inorganic Chemistry and the Periodic Table · Core Practical 1: Measuring the molar volume of a gas · Core Practical 7: Identify unknown organic liquids and inorganic solids · Topic 15: Transition Metals
- Question 7 9 marks
Define periodicity and illustrate it with atomic radii, then explain the trend in melting temperatures of Period 2 elements in terms of structure and bonding.
Physical Chemistry · Inorganic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 2: Bonding and Structure
- Question 8 8 marks
Explain the thermal stability and decomposition reactions of Group 1 and Group 2 nitrates and carbonates.
Inorganic Chemistry · Physical Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 2: Bonding and Structure