OCR•J258•Twenty First Century Science
OCR GCSE Chemistry B
8 sections · 239 revision notes, with key terms, exam tips and past papers
Starts with The particle model.
Specification
Read OCR’s specification (PDF) (opens in a new tab)
What’s on each paper: Breadth in chemistry (Foundation) · Depth in chemistry (Foundation) · Breadth in chemistry (Higher) · Depth in chemistry (Higher)
Chapter C1 Air and water
Atmospheric changes over time · Energy changes in reactions · Evidence and causes of climate change · Potable water supply30 notes
C1.1 Atmospheric changes over time
- The particle model
- Limitations of the particle model
- Energy transfers and changes of state
- Predicting states
- Formation of the atmosphere
- Development of oxygen-rich atmosphere
- Pollutants from combustion
- Problems and reduction of pollutants
- Chemical formulae
- Writing balanced equations
- Balancing equations computations
- Gas tests
- Oxidation
C1.2 Energy changes in reactions
C1.3 Evidence and causes of climate change
C1.4 Potable water supply
Chapter C2 Chemical patterns
History of the atomic model · The Periodic Table and elements · Formation of compounds · Chemical equations · Transition metal properties33 notes
C2.1 History of the atomic model
C2.2 The Periodic Table and elements
C2.3 Formation of compounds
- Group 0 properties
- Outer shell electrons and properties
- Reactions and electron arrangement
- Atomic structure and Periodic Table position
- Ionic bonding nature
- Ionic bonding explanation
- Calculating particles in ions
- Dot and cross diagrams
- Bulk properties of ionic materials
- Melting points of ionic compounds
- Limitations of models
- Translating chemical structures
C2.4 Chemical equations
C2.5 Transition metal properties
Chapter C3 Chemicals of the natural environment
Metallic bonding · Metal extraction and reactivity · Electrolysis principles · Crude oil and hydrocarbons35 notes
C3.1 Metallic bonding
C3.2 Metal extraction and reactivity
C3.3 Electrolysis principles
C3.4 Crude oil and hydrocarbons
- Crude oil as a source
- Finite resource
- Fractional distillation
- Fractions and alkanes
- Changes of state and intermolecular forces
- Empirical formula
- Calculating empirical formulae
- Bonding in simple molecules
- Covalent bonding
- Dot and cross diagrams for covalent
- 3D shapes of simple molecules
- Limitations of molecular models
- Diagrammatic and numerical translation
- Properties of simple molecules
- Cracking
- Functional groups
- Naming organic compounds
- Predicting reaction products
- Generality of functional group reactions
Chapter C4 Material choices
Material selection properties · Polymer types · Bonding, structure, and properties · Nanoparticles · End-of-life product management31 notes
C4.1 Material selection properties
C4.2 Polymer types
C4.3 Bonding, structure, and properties
C4.4 Nanoparticles
C4.5 End-of-life product management
Chapter C5 Chemical analysis
Separation and purity · Composition analysis · Stoichiometry calculations · Solution measurements38 notes
C5.1 Separation and purity
C5.2 Composition analysis
C5.3 Stoichiometry calculations
- Conservation of mass
- Mass changes in non-enclosed systems
- Relative formula masses
- Avogadro constant and the mole
- Mass to moles relationship
- Stoichiometry and limiting reactants
- Calculations from equations
- Arithmetic computation
- Standard form calculations
- Changing subject of equation
- Theoretical mass
- Percentage yield
- Reasons for low yield
- Molar gas volume
Chapter C6 Making useful chemicals
Useful acid products · Reaction rate control · Reaction yield factors · Industrial chemical synthesis34 notes
C6.1 Useful acid products
C6.2 Reaction rate control
C6.3 Reaction yield factors
C6.4 Industrial chemical synthesis
Chapter C7 Ideas about Science
Scientific investigation planning · Data interpretation and conclusions · Development of scientific theory · Impact of science and technology30 notes
IaS1 Scientific investigation planning
IaS2 Data interpretation and conclusions
IaS3 Development of scientific theory
IaS4 Impact of science and technology
Chapter C8 Practical skills
Reactivity trend · Electrolysis · Separation Techniques · Distillation · Identification of species · Titration · Production of salts · Measuring rates of reaction8 notes
PAG1 Reactivity trend
PAG2 Electrolysis
PAG3 Separation Techniques
PAG4 Distillation
PAG5 Identification of species
PAG6 Titration
PAG7 Production of salts
PAG8 Measuring rates of reaction
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