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Langley Grammar School

Langley Grammar School


Years 7 and 8

Please refer to the Science (Years 7&8) subject page for details of the chemistry topics taught in years 7 and 8.



Students studying the subject at GCSE follow the OCR Gateway Chemistry A J248 specification. During the course the following topics are covered.

Year 9 Year 10 Year 11

C1 Particles

  • C1.1 The particle model
  • C1.2 Chemical and physical changes
  • C1.3 Limitations of the particle model
  • C2.1 Atomic structure
  • C2.2 Isotopes
  • C2.3 Developing the atomic model

C2.1 Topic – Elements, Compounds and Mixtures

  • C2.1.1 Relative formula mass
  • C2.1.2 Empirical formula
  • C2.1.3 Pure and impure substances
  • C2.1.4 Filtration and crystallisation
  • C2.1.5 Distillation
  • C2.1.6 Chromatography
  • C2.1.7 Purification and checking purity

C2.2 Bonding

  • C2.2.1 Metals and non-metals
  • C2.2.2 Electronic structure
  • C2.2.3 Forming Ions
  • C2.2.4 Ionic compounds (ball and stick models)
  • C2.2.5 Simple molecules
  • C2.2.6 Giant covalent structures
  • C2.2.7 Polymer molecules
  • C2.2.8 Structure of metals
  • C2.2.9 Developing the periodic table
  • C2.2.10 Atomic structure and the periodic table

C2.3 Properties of Materials

  • C2.3.1 Carbon
  • C2.3.2 Changing state
  • C2.3.3 Bulk properties of materials.
  • C2.3.4 Nanoparticles

C3 Chemical Reactions

  • C3.1.1 Formulae of elements and molecules
  • C3.1.2 Formulae of ionic compounds
  • C3.1.3 Conservation of mass
  • C3.1.4 Chemical equations
  • C3.1.5 Half equations and ionic equations
  • C3.1.6 Detecting gases
  • C3.1.7 Mole calculations and concentration of solution
  • C3.1.8 Mole calculations

C3.2 Energetics

  • C3.2.1 Exothermic and endothermic reactions
  • C3.2.2 Reaction profiles
  • C3.2.3 Calculating energy changes

C3.3 Types of Chemical Reaction

  • C3.3.1 Redox reactions
  • C3.3.2 The pH scale
  • C3.3.3 Neutralisation
  • C3.3.4 Reactions of acids
  • C3.3.5 Hydrogen ions and pH

C3.4 Electrolysis

  • C3.4.1 Electrolysis of molten salts
  • C3.4.2 Electrolysis of solutions
  • C3.4.3 Electroplating

C4 Predicting Chemical Reactions

  • C4.1.2 Group 7 – The halogens
  • C4.1.3 Halogen displacement reactions
  • C4.1.4 Group 0 - The noble gases
  • C4.1.5 The transition metals
  • C4.1.6 Reactivity of elements

C5 Monitoring and controlling chemical reactions

C5.1 Monitoring chemical reactions

  • C5.1.1 Rate of reaction
  • C5.1.2 Temperature and Reaction
  • C5.1.3 Concentration, pressure and reaction rate
  • C5.1.4 Particle size and reaction rate
  • C5.1.5 Catalyst and reaction rate

C5.2 Equilibria

  • C5.2.1 Reversible reactions
  • C5.2.2 Equilibrium position
  • C5.2.3 Choosing reaction conditions


C6 Global challenges

C6.1 Improving processes and products

  • C6.1.1 Extracting metals
  • C6.1.2 Extracting iron
  • C6.1.3 Extracting aluminium
  • C6.1.4 Biological metal extraction
  • C6.1.5 Choosing materials
  • C6.1.6 Recycling materials
  • C6.1.7 Alkanes from crude oil
  • C6.1.8 Cracking oil fractions

C6.2 Interpreting and interacting with Earth systems

  • C6.2.1 Forming the atmosphere
  • C6.2.2 Pollution and the atmosphere
  • C6.2.3 Climate change
  • C6.2.4 Water for drinking

Revision for exams

For more detailed information on the course content and assessment please refer to the examination board website:


A Level

Students studying the subject at A Level follow the OCR Chemistry B (Salters) H433 specification. During the course the following topics are covered.

Year 12 Year 13

Elements of life

  • atomic structure, atomic spectra and electron
  • configurations
  • fusion reactions
  • mass spectrometry and isotopes
  • the periodic table and Group 2 chemistry
  • bonding and the shapes of molecules
  • chemical equations and amount of substance
  • (moles)
  • ions: formulae, charge density, tests
  • titrations and titration calculations.


Developing fuels

  • thermochemistry
  • organic chemistry: names and combustion of alkanes, alkenes, alcohols
  • heterogeneous catalysis
  • reactions of alkenes
  • addition polymers
  • electrophilic addition
  • gas volume calculations
  • shapes of organic molecules, σ- and π-bonds
  • structural and E/Z isomers
  • dealing with polluting gases.


Elements from the sea

  • halogen chemistry
  • redox chemistry and electrolysis
  • equilibrium
  • atom economy.


The ozone story

  • composition by volume of gases
  • the electromagnetic spectrum and the interaction of radiation with matter
  • rates of reaction
  • radical reactions
  • intermolecular bonding
  • haloalkanes
  • nucleophilic substitution reactions
  • the sustainability of the ozone layer


What’s in a medicine?

  • the chemistry of the –OH group, phenols and alcohols
  • carboxylic acids and esters
  • mass spectrometry and IR spectroscopy
  • organic synthesis, preparative techniques and thin layer chromatography
  • green chemistry.

The chemical industry

  • aspects of nitrogen chemistry
  • kinetics
  • equilibrium and equilibrium constant calculations
  • effects of factors on the rate and equilibrium yields of reactions; consideration of the best conditions for an industrial process
  • analysis of costs, benefits and risks of industrial processes


Polymers and life

  • condensation polymers
  • organic functional groups
  • amines and amides
  • acid–base equilibria
  • amino acid and protein chemistry
  • optical isomerism
  • enzyme catalysis and molecular recognition
  • the structure and function of DNA and RNA
  • structural analysis.



  • dissolving and associated enthalpy changes
  • the greenhouse effect
  • acid–base equilibria and pH
  • solubility products
  • entropy.


Developing metals

  • redox titrations
  • cells and electrode potentials
  • d-block chemistry
  • colorimetry


Colour by design

  • the chemical origins of colour in organic compounds
  • aromatic compounds and their reactions
  • dyes and dyeing
  • diazonium compounds
  • fats and oils
  • gas–liquid chromatography
  • carbonyl compounds and their reactions
  • organic synthesis and polyfunctional compounds

For more detailed information on the course content and assessment please refer to the examination board website:


Additional resources

Students may find the following links and/or resources useful to further their studies of this subject:

BBC Bitesize KS3 Science