Edexcel A-Level Chemistry AS Paper 1, June 2018
Every question from Edexcel A-Level Chemistry AS Paper 1, June 2018 (8CH0): 8 questions, 80 marks, each with its mark scheme and topic.
- Question 1 9 marks
Describe covalent and dative covalent bonding, deduce the shape and bond angles of ammonia and boron trifluoride, and explain how their reaction changes these bond angles.
Physical Chemistry · Topic 2: Bonding and Structure
- Question 2 15 marks
Calculate the relative atomic mass of hydrogen, write equations for its first ionisation energy, and explain periodic trends and properties relating to its position in the Periodic Table.
Physical Chemistry · Inorganic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 4: Inorganic Chemistry and the Periodic Table
- Question 3 8 marks
Determine the concentration of potassium hydroxide from titration data with sulfuric acid, including apparatus selection, indicator end-point colour, and reading burette scales.
Physical Chemistry · Core Practicals · Topic 5: Formulae, Equations and Amounts of Substance · Core Practical 3: Find the concentration of a solution of hydrochloric acid
- Question 4 8 marks
Identify an unknown hydrated ionic compound from chemical tests and flame tests, and calculate its water of crystallisation from thermal decomposition mass loss data.
Inorganic Chemistry · Physical Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance
- Question 5 15 marks
Analyse the preparation of a hydrated metal chloride from its carbonate, identify the metal using stoichiometry and flame testing, and calculate the percentage yield.
Physical Chemistry · Inorganic Chemistry · Topic 4: Inorganic Chemistry and the Periodic Table · Topic 5: Formulae, Equations and Amounts of Substance
- Question 6 10 marks
Deduce the electron configuration of chlorine, explain group similarity with iodine, calculate sulfur oxidation numbers, and balance redox half-equations and overall ionic equations for thiosulfate reactions.
Physical Chemistry · Inorganic Chemistry · Topic 1: Atomic Structure and the Periodic Table · Topic 3: Redox I · Topic 4: Inorganic Chemistry and the Periodic Table
- Question 7 6 marks
Discuss the reasons for the differences in the boiling temperatures of hydrogen fluoride, water, and methane using given data and electronegativity values.
Physical Chemistry · Topic 2: Bonding and Structure
- Question 8 9 marks
Analyze ionic bonding, including equations for formation, dot-and-cross diagrams, trends in ionic radius across isoelectronic ions, and the effect of cation charge and radius on ionic bond strength.
Physical Chemistry · Inorganic Chemistry · Topic 2: Bonding and Structure · Topic 4: Inorganic Chemistry and the Periodic Table