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A-Level Chemistry · AQA · Physical

Define first ionisation energy

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Answer
  • The energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous 1+ ions
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A-Level Chemistry · AQA · Physical

Do changes in pressure, concentration or a catalyst affect the value of Kc?

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Answer
  • No
  • They may shift the position of equilibrium, but the ratio (Kc) remains constant at a fixed temperature
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A-Level Chemistry · AQA · Physical

Why are Hess cycles more accurate than mean bond enthalpies?

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Answer
  • Bond enthalpies are averages taken from many different compounds
  • Hess cycles use specific data for the exact substances in the reaction
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A-Level Chemistry · AQA · Inorganic

What is the test for sulfate ions (SO4 2-)?

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Answer
  • Add dilute hydrochloric acid (HCl)
  • Add aqueous barium chloride (BaCl2)
  • A thick white precipitate indicates sulfate ions
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A-Level Chemistry · AQA · Inorganic

Observations when testing for chloride, bromide and iodide ions

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Answer
  • Chloride: white precipitate, dissolves in dilute and concentrated ammonia
  • Bromide: cream precipitate, dissolves only in concentrated ammonia
  • Iodide: yellow precipitate, insoluble in dilute and concentrated ammonia
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A-Level Chemistry · AQA · Inorganic

Trend in reactivity down Group 7, and why

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Answer
  • Reactivity decreases down the group
  • The outer electrons are further from the nucleus, as there is an extra energy level each time
  • There is an increase in shielding
  • The atoms gain electrons less easily, as there is a weaker attraction between the nucleus and the incoming electron
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A-Level Chemistry · AQA · Organic2 marks

Why do branched isomers of alkanes have lower boiling points?

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Answer2 marks
  • Branched molecules have a smaller surface area in contact with each other, decreasing the strength of van der Waals forces
  • Branched molecules cannot pack as closely together as straight-chain molecules, further weakening those forces
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A-Level Chemistry · AQA · Organic

Compare the conditions for thermal and catalytic cracking

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Answer
  • Thermal: very high temperature (1000-1200 K), very high pressure (70 atm), very short time (about 1 s)
  • Catalytic: high temperature (800-1000 K), slight pressure (1-2 atm), zeolite catalyst
A-LevelAQA

AQA A-level Chemistry Flashcards

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What's inside

AQA A-Level Chemistry Flashcards

Digital flashcards covering AQA A-Level Chemistry. Choose the section you need: Physical, Organic or Inorganic.

The cards target common question styles and AQA assessment objectives, helping you recognise patterns, sharpen exam technique and secure easy marks under exam conditions.

Choose your option:

Physical: 850+ flashcards (12 units)
Organic: 800+ flashcards (16 units), including mechanism drawings, reaction types and conditions
Inorganic: 500+ flashcards (6 units)

Physical topics:

UNIT 1: Atomic structure
UNIT 2: Amount of substance
UNIT 3: Bonding
UNIT 4: Energetics
UNIT 5: Kinetics
UNIT 6: Equilibrium
UNIT 7: Oxidation, reduction and redox equations
UNIT 8: Thermodynamics
UNIT 9: Rate equations
UNIT 10: Equilibrium constant
UNIT 11: Electrode potentials and cells
UNIT 12: Acids and bases

Organic topics:

UNIT 1: Introduction to organic chemistry
UNIT 2: Alkanes
UNIT 3: Halogenoalkanes
UNIT 4: Alkenes
UNIT 5: Alcohols
UNIT 6: Organic analysis
UNIT 7: Optical isomers
UNIT 8: Aldehydes and ketones
UNIT 9: Carboxylic acids and esters
UNIT 10: Aromatic chemistry
UNIT 11: Amines
UNIT 12: Polymerisation
UNIT 13: Amino acids, proteins and DNA
UNIT 14: Organic synthesis
UNIT 15: Nuclear magnetic resonance spectroscopy
UNIT 16: Chromatography

Inorganic topics:

UNIT 1: Periodicity
UNIT 2: Group 2 metals
UNIT 3: Group 7 (the halogens)
UNIT 4: Period 3 elements
UNIT 5: Transition metals
UNIT 6: Reactions of metal aqua ions

Format: Digital download, compatible with Quizlet and Anki
Exam board: AQA
Course: A-Level Chemistry

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