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OCR AS-level Chemistry

OCR Chemistry A (H032)10 topics128 lessons

Free OCR AS-level Chemistry revision for OCR Chemistry A (H032): 10 topics and 128 short lessons, each with R.E.C.I.P.E. recall steps and a quiz. The topics follow the OCR specification.

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1. Atoms, Ions and Compounds

17 lessons

  1. The Nuclear Atom.
  2. Atomic Number
  3. Isotopes
  4. Ions
  5. Carbon-12
  6. Relative Isotopic Mass
  7. Relative Atomic Mass
  8. The Mass Spectrometer
  9. Calculating Relative Atomic Mass
  10. Chemical Formulae
  11. Polyatomic ions
  12. Chemical Equations
  13. Electron Shells
  14. Spin
  15. Ionisation Energy
  16. Successive Ionisation Energies
  17. Trends in Ionisation Energy

2. Amount of Substance

16 lessons

  1. Amount of Substance
  2. Molar Mass
  3. Empirical Formula
  4. Empirical Formula Calculation
  5. Relative Formula Mass
  6. Relative Molecular Mass
  7. Molecular Formula
  8. Hydrated Salts
  9. Solutions and Concentrations
  10. Standard Solutions
  11. Molar Gas Volume
  12. Ideal Gas Equation
  13. Reacting Masses
  14. Limiting Reagent
  15. Percentage Yield
  16. Atom Economy

3. Acids and Redox

6 lessons

  1. Acids
  2. Strong and Weak Acids
  3. Bases and Alkalis
  4. Neutralisation
  5. Titrations
  6. Redox

4. Electrons and Bonding

7 lessons

  1. Electron Structure
  2. Filling of Orbitals and Electron Pairing
  3. Ionic Bonding
  4. Structure and Properties of Ionic Compounds
  5. Covalent Bonding
  6. Single, Double and Triple Bonds
  7. Dative Covalent Bonds

5. Shapes and Intermolecular Forces

13 lessons

  1. Electron Pair Repulsion Theory
  2. Three and Four Electron Pairs
  3. BF3 and SF6 and PCl5
  4. Polyatomic ions.
  5. More examples.
  6. Electronegativity
  7. Bond Polarity
  8. Polar Solvents and Solubility
  9. Induced Dipole-Dipole Interactions (London Forces)
  10. Permanent dipole-dipole interactions
  11. Solubility of Simple Molecules
  12. Hydrogen Bonds
  13. Boiling Points of Hydrides and Intermolecular forces

6. Periodicity

14 lessons

  1. The Periodic Table
  2. Electron Configuration
  3. Ionisation Energy
  4. Successive Ionisation Energies
  5. Trends in First Ionisation Energies Across a Period
  6. Trends in First Ionisation Energies Down a Group
  7. Beryllium and Boron
  8. Nitrogen and Oxygen
  9. Metallic Bonding
  10. Properties of Metals
  11. Giant Covalent Structures
  12. Diamond
  13. Graphite and Graphene
  14. Periodic Trends in Melting Points

7. Reactivity Trends

16 lessons

  1. Group 2 elements as Reducing Agents
  2. Group 2 Redox Reactions with Oxygen
  3. Group 2 Redox Reactions with Water
  4. Group 2 Redox Reactions with Dilute Acids
  5. Group 2 Reactivity and Ionisation Energy
  6. Reactions of Group 2 Oxides
  7. Solubility of Group 2 Hydroxides
  8. Uses of Group 2 Compounds
  9. Group 7 Halogens Trends in Boiling Points
  10. Group 7 Redox Reactions and Reactivity
  11. Halogen-Halide Displacement Reactions
  12. Halogen Disproportionation Reactions
  13. Uses of Halogens
  14. Test for Halide Ions
  15. Test for Anions
  16. Test for Ammonium Ions

8. Enthalpy

19 lessons

  1. Enthalpy and Enthalpy Changes
  2. Endothermic and Exothermic Reactions
  3. Activation Energy
  4. Standard Enthalpy Changes and Standard Conditions
  5. Enthalpy Change of Reaction
  6. Enthalpy Change of Formation
  7. Enthalpy Change of Combustion
  8. Enthalpy Change of Neutralisation
  9. Measuring the Enthalpy Change of Combustion
  10. Accuracy of Experimental Value
  11. Determining the Enthalpy Change of a Reaction
  12. Cooling Curves
  13. Average Bond Enthalpy
  14. Calculating Enthalpy Changes from Bond Enthalpies
  15. Limitations of Bond Enthalpy Calculations
  16. Hess's Law
  17. Determination of Enthalpy Change of a Reaction from Enthalpies of Formation Using Hess's Law
  18. Determination of Enthalpy Change of a Reaction from Enthalpies of Combustion using Hess's Law
  19. Exam-style Question

9. Reaction Rates

10 lessons

  1. The Rate of Reaction
  2. Factors affecting the Rate of a Chemical Reaction
  3. Following the Progress of a Reaction
  4. Catalysts
  5. Homogenous Catalysts
  6. Heterogenous Catalysts
  7. Catalysts and Sustainability
  8. Autocatalysis
  9. The Boltzmann Distribution Curve and Temperature
  10. The Boltzmann Distribution Curve and Catalysts

10. Equilibrium

10 lessons

  1. Dynamic Equilibrium
  2. Le Chatelier's Principle
  3. Effect of Changing the Concentration on the Position of Equilibrium
  4. Effects of Temperature on the Position of Equilibrium
  5. Effects of Pressure on the position of Equilibrium
  6. Effects of Catalysts on the Position of Equilibrium
  7. The Haber Process
  8. The Equilibrium Law
  9. Calculating the Equilibrium Constant
  10. Significance of the Equilibrium Constant