Specification points
OCR GCSE Gateway Science Suite - Chemistry A J248
292 points in 9 topics, with OCR's codes and titles.
Grade boundaries·OCR command words
Codes and titles are read by a script from OCR's published specification and have not been checked by a person. What each point covers is in the specification itself: OCR’s specification.
C1 Particles
- C1.1 The particle model
- CM1.1i Representing 3-D structures in 2-D
- C1.1a The particle model and states of matter
- C1.1b Physical and chemical changes
- C1.1c Limitations of the particle model
- C1.2 Atomic structure
- CM1.2i Size and scale of atoms
- CM1.2ii Estimating sizes of atoms and nanoparticles
- C1.2a Development of the atomic model
- C1.2b Nucleus and electrons in the atom
- C1.2c Typical sizes of atoms and molecules
- C1.2d Charges and masses of subatomic particles
- C1.2e Protons, neutrons and electrons in atoms and ions
C2 Elements, compounds and mixtures
- C2.1 Purity and separating mixtures
- CM2.1i Arithmetic and ratio in quantitative chemistry
- CM2.1ii Significant figures
- CM2.1iii Changing the subject of an equation
- CM2.1iv Ratio in empirical formulae and equations
- C2.1a Purity in science and everyday use
- C2.1b Melting points and purity
- C2.1c Relative formula mass
- C2.1d Empirical formulae
- C2.1e Formulations
- C2.1f Filtration, crystallisation and distillation
- C2.1g Paper and thin layer chromatography
- C2.1h Stationary and mobile phases
- C2.1i Chromatograms and Rf values
- C2.1j Choosing purification techniques
- C2.1k Chromatography to test purity
- C2.2 Bonding
- CM2.2i Estimating sizes of atoms and nanoparticles
- CM2.2ii Representing 3-D structures in 2-D
- CM2.2iii Diagrammatic and numerical forms
- C2.2a Metals and non-metals compared
- C2.2b Atomic structure and position in the Periodic Table
- C2.2c Electron arrangement and Periodic Table position
- C2.2d Types of bonding and structure
- C2.2e Bonding as electrostatic forces
- C2.2f Dot and cross diagrams
- C2.2g Limitations of bonding models
- C2.2h Reactions and electron arrangement
- C2.2i Mendeleev and the modern Periodic Table
- C2.3 Properties of materials
- CM2.3i Representing 3-D structures in 2-D
- CM2.3ii Size and scale of atoms
- CM2.3iii Estimating sizes of atoms and nanoparticles
- CM2.3iv Standard form for nanoparticles
- CM2.3v Ratios in size and surface area comparisons
- CM2.3vi Surface areas and volumes of cubes
- C2.3a Carbon's four covalent bonds
- C2.3b Carbon compounds: chains, rings and families
- C2.3c Diamond, graphite, fullerenes and graphene
- C2.3d Bonds, forces and changes of state
- C2.3e Predicting states from data
- C2.3f Bulk properties and bonding
- C2.3g Nano dimensions compared with atoms
- C2.3h Surface area to volume ratio of particles
- C2.3i Uses of nanoparticulate materials
- C2.3j Risks of nanoparticles
C3 Chemical reactions
- C3.1 Introducing chemical reactions
- CM3.1i Ratio in empirical formulae and equations
- CM3.1ii Standard form with the Avogadro constant
- CM3.1iii Significant figures
- CM3.1iv Converting mass to moles
- C3.1a Formulae of elements and compounds
- C3.1b Balanced equations and half equations
- C3.1c Equations using the Periodic Table
- C3.1d Formulae from common ions
- C3.1e Balanced ionic equations
- C3.1f State symbols
- C3.1g The Avogadro constant and the mole
- C3.1h Mass and amount in moles
- C3.1i Conservation of mass
- C3.1j Mass changes in open systems
- C3.1k Stoichiometry and limiting reactants
- C3.1l Reacting mass calculations
- C3.2 Energetics
- CM3.2i Reaction profile charts
- CM3.2ii Calculating energy changes
- C3.2a Endothermic and exothermic reactions
- C3.2b Reaction profiles
- C3.2c Activation energy
- C3.2d Energy changes from bond energies
- C3.3 Types of chemical reactions
- CM3.3i Arithmetic and ratio in quantitative chemistry
- C3.3a Oxidation and reduction by oxygen
- C3.3b Oxidation and reduction by electrons
- C3.3c Hydrogen and hydroxide ions in acids and alkalis
- C3.3d Neutralisation
- C3.3e Neutralisation as H⁺ and OH⁻ reacting
- C3.3f Acids with carbonates and metals
- C3.3g Dilute, concentrated, weak and strong acids
- C3.3h pH as a measure of acidity
- C3.3i Hydrogen ion concentration and pH
- C3.3j Tenfold change in hydrogen ions and pH
- C3.3k Measuring pH
- C3.4 Electrolysis
- CM3.4i Ratio in empirical formulae and equations
- C3.4a Products at electrodes with inert electrodes
- C3.4b Electrolysis of molten binary compounds
- C3.4c Electrolysis of aqueous solutions
- C3.4d Ions and electrode reactions in electrolysis
- C3.4e Electrolysis with inert and non-inert electrodes
C4 Predicting and identifying reactions and products
- C4.1 Predicting chemical reactions
- CM4.1i Ratio in empirical formulae and equations
- C4.1a Properties of Groups 1, 7 and 0
- C4.1b Group trends and outer electrons
- C4.1c Transition metals and their compounds
- C4.1d Predicting reactivity from the Periodic Table
- C4.1e Metal reactivity and forming positive ions
- C4.1f Reactivity series from experiments
- C4.2 Identifying the products of chemical reactions
- CM4.2i Interpreting spectroscopy charts
- C4.2a Tests for gases
- C4.2b Tests for cations and anions
- C4.2c Flame tests
- C4.2d Identifying species from tests
- C4.2e Metal ions from flame tests
- C4.2f Advantages of instrumental analysis
- C4.2g Interpreting instrumental results
C5 Monitoring and controlling chemical reactions
- C5.1 Monitoring chemical reactions
- CM5.1i Standard form with the Avogadro constant
- CM5.1ii Significant figures
- CM5.1iii Converting mass to moles
- CM5.1iv Arithmetic and ratio in quantitative chemistry
- CM5.1v Yield and atom economy calculations
- CM5.1vi Changing the subject of an equation
- C5.1a Concentration in mol/dm³
- C5.1b Titration
- C5.1c Titration volumes and concentrations
- C5.1d Moles and volumes of gases
- C5.1e Gas volumes using molar gas volume
- C5.1f Mass, volume and concentration
- C5.1g Theoretical mass of product
- C5.1h Percentage yield
- C5.1i Atom economy
- C5.1j Calculating atom economy
- C5.1k Choosing a reaction pathway
- C5.2 Controlling reactions
- CM5.2i Arithmetic and ratio in rates
- CM5.2ii Graphs of reaction rate
- CM5.2iii Gradients as rates
- CM5.2iv Proportionality in rate factors
- C5.2a Methods for measuring rates
- C5.2b Interpreting rate graphs
- C5.2c Factors affecting rate of reaction
- C5.2d Collision theory and rate
- C5.2e Surface area to volume ratio and rate
- C5.2f Catalysts and rate
- C5.2g Identifying catalysts
- C5.2h Catalysts and activation energy
- C5.2i Enzymes as biological catalysts
- C5.3 Equilibria
- CM5.3i Arithmetic and ratio in rates
- CM5.3ii Graphs of reaction rate
- CM5.3iii Gradients as rates
- CM5.3iv Proportionality in rate factors
- C5.3a Reversible reactions
- C5.3b Dynamic equilibrium
- C5.3c Changing conditions and equilibrium position
C6 Global challenges
- C6.1 Improving processes and products
- CM6.1i Arithmetic and ratio in rates
- CM6.1ii Graphs of reaction rate
- CM6.1iii Gradients as rates
- CM6.1iv Proportionality in rate factors
- C6.1a Extracting metals using carbon
- C6.1b Extracting metals by electrolysis
- C6.1c Biological methods of metal extraction
- C6.1d Rate and equilibrium trade-off in industry
- C6.1e Graphs of conditions and rate
- C6.1f Choosing industrial conditions
- C6.1g The Haber process and agriculture
- C6.1h Industrial and laboratory fertiliser production
- C6.1i Nitrogen, phosphorus and potassium in farming
- C6.1j Industrial fertiliser production as integrated processes
- C6.1k Life-cycle assessment
- C6.1l Interpreting life-cycle assessments
- C6.1m Recycling for a different use
- C6.1n Decisions on recycling
- C6.1o Alloys and their uses
- C6.1p Corrosion
- C6.1q Preventing corrosion
- C6.1r Properties of ceramics, polymers, composites and metals
- C6.1s Choosing materials for their uses
- C6.2 Organic chemistry
- CM6.2i Representing 3-D structures in 2-D
- C6.2a Functional groups and homologous series
- C6.2b Naming and drawing first four members of series
- C6.2c Predicting products of reactions of organic series
- C6.2d Addition polymerisation
- C6.2e Condensation polymerisation
- C6.2f Making a condensation polymer
- C6.2g Addition polymers and their monomers
- C6.2h DNA and other natural polymers
- C6.2i Functional groups determine reactions
- C6.2j Describing fractional distillation of crude oil
- C6.2k Explaining fractional distillation of crude oil
- C6.2l Crude oil fractions as alkanes
- C6.2m Crude oil as a petrochemical feedstock
- C6.2n Dependence on hydrocarbons as a finite resource
- C6.2o Cracking
- C6.2p Chemical cells
- C6.2q Fuel cells: advantages and disadvantages
- C6.3 Interpreting and interacting with earth systems
- CM6.3i Information from charts, graphs and tables
- CM6.3ii Orders of magnitude in evaluating data
- C6.3a Formation of the early atmosphere
- C6.3b Development of an oxygen-rich atmosphere
- C6.3c The greenhouse effect
- C6.3d Evidence for human causes of climate change
- C6.3e Effects and mitigation of carbon dioxide and methane
- C6.3f Atmospheric pollutants and their problems
- C6.3g Increasing potable water supply
C7 Practical skills
5e Working scientifically
- WS1 Working scientifically assessed in written examinations
- WS1.1 Development of scientific thinking
- WS1.1a How scientific methods and theories develop
- WS1.1b Using models in science
- WS1.1c Power and limitations of science
- WS1.1d Ethical issues in science
- WS1.1e Applications of science
- WS1.1f Implications of science for society
- WS1.1g Evidence-based decision making
- WS1.1h Evaluating risks
- WS1.1i Peer review and communicating results
- WS1.2 Experimental skills and strategies
- WS1.2a Developing hypotheses
- WS1.2b Planning experiments
- WS1.2c Choosing techniques and apparatus
- WS1.2d Representative sampling
- WS1.2e Evaluating and improving methods
- WS1.3 Analysis and evaluation
- WS1.3a Presenting observations and data
- WS1.3b Translating data between forms
- WS1.3c Mathematical and statistical analysis
- WS1.3d Distributions of results and uncertainty
- WS1.3e Interpreting observations and data
- WS1.3f Reasoned explanations
- WS1.3g Accuracy, precision, repeatability and reproducibility
- WS1.3h Random and systematic errors
- WS1.3i Communicating investigations and conclusions
- WS1.4 Scientific vocabulary, quantities, units, symbols and nomenclature
- WS1.4a Scientific vocabulary and definitions
- WS1.4b Scientific quantities
- WS1.4c SI units and IUPAC names
- WS1.4d Prefixes and powers of ten
- WS1.4e Converting units
- WS1.4f Significant figures
- WS2 Working scientifically skills demonstrated
- WS2a Carrying out experiments
- WS2b Recording observations and measurements
- WS2c Presenting observations
- WS2d Communicating investigations and conclusions
5f Mathematical skills requirement
- M1 Arithmetic and numerical computation
- M1a Decimal form
- M1b Standard form
- M1c Ratios, fractions and percentages
- M1d Estimating results of calculations
- M2 Handling data
- M2a Significant figures
- M2b Arithmetic means
- M2c Frequency tables, bar charts and histograms
- M2h Order of magnitude calculations
- M3 Algebra
- M3a Mathematical symbols
- M3b Changing the subject of an equation
- M3c Substituting values into equations
- M4 Graphs
- M4a Graphical and numeric forms
- M4b Linear relationships: y = mx + c
- M4c Plotting two variables from data
- M4d Slope and intercept of a linear graph
- M4e Tangents to curves as rates of change
- M5 Geometry and trigonometry
- M5b Representing 2-D and 3-D forms
- M5c Areas, surface areas and volumes