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Edexcel GCSE Chemistry

Edexcel Chemistry (1CH0)9 topics237 lessons

Edexcel GCSE Chemistry revision for Edexcel Chemistry (1CH0): 9 topics and 237 short lessons, each with R.E.C.I.P.E. recall steps and a quiz. The topics follow the Edexcel specification.

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1. Key concepts in chemistry

53 lessons

  1. How the model of the atom has changed
  2. The structure of an atom
  3. Relative charge and relative mass of subatomic particles
  4. Why atoms have equal numbers of protons and electrons
  5. The size of the nucleus
  6. Where the mass of an atom is concentrated
  7. Mass number
  8. Atoms of an element and the proton number
  9. Isotopes
  10. Protons, neutrons and electrons in atoms
  11. Isotopes and relative atomic mass
  12. Calculating relative atomic mass
  13. How Mendeleev arranged the elements
  14. How Mendeleev predicted undiscovered elements
  15. Why relative atomic mass did not always work
  16. Atomic number
  17. Periods and groups
  18. Metals and non-metals
  19. Electronic configurations of the first 20 elements
  20. Electronic configuration and position in the periodic table
  21. Ionic bonding and dot and cross diagrams
  22. Ions
  23. Protons, neutrons and electrons in ions
  24. Formation of ions in ionic compounds (Groups 1, 2, 6 and 7)
  25. The endings -ide and -ate
  26. Formulae of ionic compounds
  27. Ionic compounds as lattices
  28. How a covalent bond forms
  29. Covalent bonding and molecules
  30. The size of atoms and molecules
  31. Dot and cross diagrams for simple molecules
  32. Types of substance
  33. Properties of ionic compounds
  34. Properties of simple molecular compounds
  35. Graphite and diamond
  36. Structures of graphite and diamond
  37. Uses of graphite and diamond
  38. Fullerenes and graphene
  39. Poly(ethene) as a polymer
  40. Properties of metals
  41. Limitations of models
  42. Metals and non-metals
  43. Relative formula mass and percentage by mass
  44. Formulae from reacting masses or percentages
  45. Empirical and molecular formulae
  46. Experiment to find the empirical formula of magnesium oxide
  47. Conservation of mass
  48. Calculating reacting masses
  49. Calculate the concentration of solutions in g dm–3
  50. The mole and the Avogadro constant
  51. Moles, mass and number of particles
  52. Limiting reactants and the mass of product
  53. Deducing the stoichiometry of a reaction

2. States of matter and mixtures

12 lessons

  1. Particles in solids, liquids and gases
  2. Changes of state
  3. Particles during changes of state
  4. Predicting the state of a substance
  5. Pure substances and mixtures
  6. Melting point data and purity
  7. Simple distillation, fractional distillation and filtration
  8. Choosing a method to separate a mixture
  9. Paper chromatography
  10. Interpreting a paper chromatogram
  11. Core practical: inks, distillation and chromatography
  12. Making water potable

3. Chemical changes

31 lessons

  1. Acids and alkalis: hydrogen and hydroxide ions
  2. The pH scale
  3. Indicators with acids and alkalis
  4. Ion concentration and pH
  5. A tenfold change in hydrogen ion concentration
  6. Core practical: pH change when a base is added to acid
  7. Dilute and concentrated solutions
  8. Weak and strong acids
  9. Bases
  10. Alkalis
  11. Reactions of acids to make salts
  12. Tests for hydrogen and carbon dioxide
  13. Neutralisation: an acid reacting with a base
  14. Neutralisation in terms of hydrogen and hydroxide ions
  15. Making a salt from an acid and an insoluble reactant
  16. Making a salt from an acid and a soluble reactant
  17. Core practical: making hydrated copper sulfate crystals
  18. Carrying out an acid-alkali titration to make a pure salt
  19. Solubility rules for common salts
  20. Predicting precipitates
  21. Making an insoluble salt
  22. Electrolytes
  23. Electrolysis
  24. Movement of ions in electrolysis
  25. Electrolysis of copper chloride and sodium chloride solutions
  26. Predicting products of electrolysis of molten compounds
  27. Half equations at the anode and cathode
  28. Oxidation and reduction in terms of electrons
  29. Oxidation and reduction at the electrodes
  30. Electrolysis of copper sulfate with copper electrodes and purifying copper
  31. Core Practical: Electrolysis of copper sulfate solution with inert and copper electrodes

4. Extracting metals and equilibria

17 lessons

  1. Reactivity of metals: water, acids and salt solutions
  2. Displacement reactions as redox reactions
  3. The reactivity series and forming cations
  4. Ores and where metals are found
  5. Oxidation and reduction in terms of oxygen
  6. Extraction of metals involves reduction of ores
  7. Choosing an extraction method: carbon or electrolysis
  8. Biological methods of metal extraction
  9. Resistance to oxidation and the reactivity series
  10. The advantages of recycling metals
  11. Life-cycle assessment of a product
  12. Evaluating life-cycle assessment data
  13. Reversible reactions and the symbol ⇌
  14. Dynamic equilibrium
  15. Making ammonia: a reversible reaction
  16. Conditions for the Haber process
  17. Predicting the position of equilibrium

5. Separate chemistry 1

27 lessons

  1. Transition metals and their properties
  2. Corrosion of metals
  3. Preventing rusting
  4. Electroplating
  5. Why alloys are stronger than pure metals
  6. Alloy steels
  7. Uses of metals and alloys related to their properties
  8. Concentration in mol/dm3 and g/dm3
  9. Core practical: acid-alkali titration
  10. Titration calculations
  11. Percentage yield
  12. Why the actual yield is less than the theoretical yield
  13. Atom economy
  14. Calculating atom economy
  15. Choosing a reaction pathway
  16. Molar volume of a gas
  17. Gas volumes and masses of solids
  18. Avogadro's law and gas volumes
  19. The Haber process
  20. Rate of reaching equilibrium
  21. Industrial conditions and cost
  22. Fertilisers and plant growth
  23. Making ammonium nitrate
  24. Ammonium sulfate: lab and industry
  25. Chemical cells
  26. Hydrogen-oxygen fuel cells
  27. Evaluating fuel cells

6. Groups in the periodic table

16 lessons

  1. Alkali metals, halogens and noble gases
  2. Physical properties of the alkali metals
  3. Reactions of lithium, sodium and potassium with water
  4. Trend in reactivity of the alkali metals with water
  5. Explaining the reactivity trend in group 1
  6. Colours and states of chlorine, bromine and iodine
  7. Pattern in the physical properties of the halogens
  8. Chemical test for chlorine
  9. Reactions of the halogens with metals
  10. Hydrogen halides and their acidic solutions
  11. Displacement reactions of the halogens
  12. Displacement reactions as redox reactions
  13. Relative reactivity of the halogens
  14. Why the noble gases are inert
  15. Uses of the noble gases
  16. Physical properties of the noble gases

7. Rates of reaction and energy changes

16 lessons

  1. Core practical: investigating rates of reaction
  2. Practical methods for measuring rate
  3. Collision theory and rate of reaction
  4. Factors that change the rate of reaction
  5. Interpreting rate graphs
  6. Catalysts
  7. How a catalyst changes the rate in terms of activation energy
  8. Enzymes as biological catalysts and alcoholic drinks
  9. Heat energy changes in everyday reactions
  10. Exothermic changes and reactions
  11. Endothermic changes and reactions
  12. Bond breaking and bond making
  13. Overall energy change: exothermic or endothermic
  14. Calculating energy changes from bond energies
  15. Activation energy
  16. Reaction profiles

8. Fuels and Earth science

26 lessons

  1. Hydrocarbons
  2. Crude oil
  3. Fractional distillation of crude oil
  4. Fractions of crude oil and their uses
  5. Differences between the fractions
  6. Homologous series
  7. Complete combustion of hydrocarbon fuels
  8. Incomplete combustion of hydrocarbons
  9. Carbon monoxide as a toxic gas
  10. Problems from carbon monoxide and soot in appliances
  11. Sulfur dioxide from impurities in fuels
  12. Sulfur dioxide and acid rain
  13. Oxides of nitrogen from engines
  14. Hydrogen compared with petrol as a car fuel
  15. Crude oil and natural gas as fuels
  16. Cracking large hydrocarbons
  17. Why cracking is necessary
  18. The Earth's early atmosphere
  19. The Earth's early atmosphere
  20. How the oceans formed
  21. Carbon dioxide and the oceans
  22. Plants and oxygen
  23. The test for oxygen
  24. The greenhouse effect
  25. Evidence for human activity causing climate change
  26. The atmosphere today and its effect on climate

9. Separate chemistry 2

39 lessons

  1. Identifying the ions in an unknown salt
  2. Energy released by burning alcohols
  3. Why the test for an ion must be unique
  4. Flame tests for metal ions
  5. Testing for metal ions with sodium hydroxide
  6. The chemical test for ammonia
  7. Testing for carbonate ions
  8. Identifying the ions in an unknown salt
  9. Instrumental methods of analysis
  10. Using data from a flame photometer
  11. Formulae and structures of the first four alkanes
  12. Why alkanes are saturated hydrocarbons
  13. Formulae and structures of the alkenes
  14. Alkenes as unsaturated hydrocarbons
  15. Addition reaction of alkenes with bromine
  16. Bromine water test for alkenes
  17. Complete combustion of alkanes and alkenes
  18. Polymers
  19. Poly(ethene) from ethene
  20. Other addition polymers
  21. Monomers and repeating units
  22. Properties and uses of polymers
  23. Polyesters and condensation polymerisation
  24. Problems with polymers
  25. Recycling polymers
  26. Natural polymers
  27. Alcohols
  28. The alcohol functional group and dehydration
  29. Carboxylic acids
  30. Properties of carboxylic acids
  31. Oxidation of ethanol and other alcohols
  32. Homologous series and similar reactions
  33. Making ethanol by fermentation
  34. Concentrating ethanol by fractional distillation
  35. The size of nanoparticles
  36. Properties and uses of nanoparticles
  37. Risks of nanoparticulate materials
  38. Comparing glass, ceramics, polymers, composites and metals
  39. Choosing materials for a use