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IB Chemistry SL and HL

44 lessons at SL. 66 at HL, with every HL-only topic. Five-minute lessons, exam-style questions and timed mock papers.

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Units
6
SL lessons
44
HL lessons
66
Questions
376
Key terms
144
Formulas
30

What you will study

Every lesson follows the current IB guide. Lessons marked HL are in the HL course only. The first unit is free.

Structure 1 · Models of the particulate nature of matter10 SL · 11 HL lessons · free
  1. S1.1Elements, compounds and mixtures
  2. S1.1States of matter
  3. S1.2The nuclear atom
  4. S1.2Relative atomic mass
  5. S1.2Mass spectra of elements
  6. S1.3Emission spectra and energy levels
  7. S1.3Electron configurations
  8. S1.4The mole
  9. S1.4Formulas and concentration
  10. S1.5Ideal gases
  11. S1.3Ionization energiesHL
Structure 2 · Models of bonding and structure7 SL · 11 HL lessons
  1. S2.1The ionic model
  2. S2.2Covalent bonds and Lewis formulas
  3. S2.2Shapes of molecules (VSEPR)
  4. S2.2Bond and molecular polarity
  5. S2.2Intermolecular forces
  6. S2.3The metallic model
  7. S2.4From models to materials
  8. S2.2Resonance and formal chargeHL
  9. S2.2Expanded octets: five and six domainsHL
  10. S2.2Sigma and pi bonds, hybridizationHL
  11. S2.4Condensation polymersHL
Structure 3 · Classification of matter7 SL · 10 HL lessons
  1. S3.1The periodic table
  2. S3.1Periodic trends
  3. S3.1Groups 1 and 17, oxides and oxidation states
  4. S3.2Functional groups and homologous series
  5. S3.2Naming organic compounds
  6. S3.2Structural isomers
  7. S3.2Identifying compounds: MS, IR and NMR
  8. S3.1Transition elements and complex ionsHL
  9. S3.2StereoisomersHL
  10. S3.2High-resolution ¹H NMRHL
Reactivity 1 · What drives chemical reactions?5 SL · 9 HL lessons
  1. R1.1Exothermic and endothermic reactions
  2. R1.1Calorimetry
  3. R1.2Bond enthalpies
  4. R1.2Hess’s law
  5. R1.3Energy from fuels
  6. R1.2Enthalpies of formation and combustionHL
  7. R1.2Born–Haber cyclesHL
  8. R1.4EntropyHL
  9. R1.4Gibbs energy and spontaneityHL
Reactivity 2 · How much, how fast and how far?7 SL · 10 HL lessons
  1. R2.1Equations and mole ratios
  2. R2.1Limiting reactant, yield and atom economy
  3. R2.1Titrations and gas volumes
  4. R2.2Rates and collision theory
  5. R2.2Maxwell–Boltzmann and catalysts
  6. R2.3Dynamic equilibrium
  7. R2.3Le Châtelier’s principle
  8. R2.2Rate equations and ordersHL
  9. R2.2Mechanisms and the Arrhenius equationHL
  10. R2.3Equilibrium calculationsHL
Reactivity 3 · Mechanisms of chemical change8 SL · 15 HL lessons
  1. R3.1Brønsted–Lowry acids and bases
  2. R3.1pH and the strength of acids
  3. R3.1Neutralization and pH curves
  4. R3.2Oxidation and reduction
  5. R3.2Voltaic and electrolytic cells
  6. R3.2Redox in organic chemistry
  7. R3.3Radicals
  8. R3.4Nucleophiles and electrophiles
  9. R3.1Ka, Kb and pKaHL
  10. R3.1Buffers, pH curves and indicatorsHL
  11. R3.2Standard electrode potentialsHL
  12. R3.2Electrolysis of aqueous solutionsHL
  13. R3.4Lewis acids and basesHL
  14. R3.4SN1 and SN2 mechanismsHL
  15. R3.4Electrophilic addition and substitutionHL

Try a question

From “Elements, compounds and mixtures”.

Questions are in English, like the exam. Every answer comes with an explanation.

Which of these is a compound?

  1. ASodium chloride
  2. BAir
  3. COxygen gas
  4. DBrass
Show the answer

A. Sodium chloride

NaCl contains two elements chemically bonded in a fixed 1 : 1 ratio. Air and brass are mixtures; oxygen is an element.

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The first unit is free. No card needed.

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