Source: https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-7-2-arenes

[Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [IB Diploma](https://senecalearning.com/en-gb/revision-notes/ib-diploma.md) › [Chemistry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry.md) › [Chemistry: IB Diploma Higher Level](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level.md) › Arenes

# Arenes

Chemistry: IB Diploma Higher Level, topic 3.7.2

## Structure of Benzene

Benzene is an aromatic hydrocarbon with delocalised electrons above and below the plane of the ring.

### Benzene

![Benzene](https://image-v2.cdn.app.senecalearning.com/2018-11/ec9b3964-ba56-4a82-8be5-010779bbdb51/benzene-aromatic-.png)

- Benzene is a cyclic hydrocarbon structure containing six carbons and six hydrogens (C6H6). 
- The carbons in benzene are sp2 hybridised.
- Despite its unsaturation, the reactivity of benzene is different from alkenes.

### Benzene structure

![Benzene structure](https://image-v2.cdn.app.senecalearning.com/2018-08/95077927-f00a-42f5-be5d-a93f50030660/benzene%20structure.png)

- The structure of benzene is aromatic and contains delocalised p-electrons (𝜋-bonds), due to overlapping p orbitals.
- These delocalised electrons give benzene the aromatic structure, which has increased stability compared to the theoretical cyclohexa-1,3,5-triene molecule and forces the structure into a planar geometry.
- The overlap of electron density above and below the plane of the ring dictates the structural features and reactivity of benzene and its derivatives (arenes).

### Structural representation of benzene

![Structural representation of benzene](https://image-v2.cdn.app.senecalearning.com/2019-08/282fd342-1d42-496c-b2bb-bc747f9ad94e/aromaticos-.png)

- To represent the mobility of double bonds in benzene, the skeletal structure shows that double bonds are not localised between two carbon atoms and the electrons can move around the entire structure.
- The skeletal formula represents the true structure, which is a resonance hybrid.

### Evidence to support aromatic structure

![Evidence to support aromatic structure](https://image-v2.cdn.app.senecalearning.com/2018-08/da539a39-92e3-44dc-a68c-f26e4066585c/benzene%20bond%20lengths.jpg)

- The structural parameters of benzene have been characterised by modern analytical techniques.
- Benzene shows key differences from both alkanes and alkenes.
- The crystal structure of benzene demonstrates that all carbon-carbon bond lengths are the same length (0.139 nm).
- The bond lengths are intermediate between C-C single-bond (0.154nm) and C=C double-bond (0.134nm) lengths, implying a bond order = 1.5.

### Evidence to support aromatic structure

![Evidence to support aromatic structure](https://image-v2.cdn.app.senecalearning.com/2018-08/da539a39-92e3-44dc-a68c-f26e4066585c/benzene%20bond%20lengths.jpg)

### Evidence to support aromatic structure cont.

![Evidence to support aromatic structure cont.](https://image-v2.cdn.app.senecalearning.com/2018-08/f4a33953-afab-4744-a889-eaa3ff54ce3c/benzene%20bond%20angles.png)

- Benzene is planar with a trigonal planar geometry around each carbon (120° bond angles).

### Evidence to support aromatic structure cont.

![Evidence to support aromatic structure cont.](https://image-v2.cdn.app.senecalearning.com/2021-05/2bc9845b-b79f-4b1d-9cbd-164e8773a7d8/hydrogenation%20benzene.png)

- Enthalpies for hydrogenation reactions of benzene can be compared to theoretical values for cyclohexa-1,3,5-triene to give evidence for increased stability of aromatic structures.
- Hydrogenation of benzene is -208 kJ mol-1, which is 151 kJ mol-1 less exothermic than the theoretical value.
- This increased stability is attributed to the delocalised electrons (aromaticity) and losing the aromaticity in addition reactions, such as hydrogenation, is unfavourable.

### Evidence to support aromatic structure cont.

![Evidence to support aromatic structure cont.](https://image-v2.cdn.app.senecalearning.com/2021-05/2bc9845b-b79f-4b1d-9cbd-164e8773a7d8/hydrogenation%20benzene.png)

## Reactions of Benzene

Benzene typically undergoes electrophilic substitution reactions, rather than addition.

### Substitution, not addition

![Substitution, not addition](https://image-v2.cdn.app.senecalearning.com/2018-08/20edc6a4-602b-4608-91a4-5a588294ebd9/general%20electrophilic%20sub.png)

- Reactions of benzene and its derivatives are typically substitution and not addition. 
- This is different from what we observed with alkenes, which normally undergo electrophilic addition reactions.

### Substitution, not addition cont.

![Substitution, not addition cont.](https://image-v2.cdn.app.senecalearning.com/2018-08/20edc6a4-602b-4608-91a4-5a588294ebd9/general%20electrophilic%20sub.png)

- As with alkenes, the reaction pathway starts with high-electron density in 𝜋-bonds attracting and being attacked by an incoming electrophile.
- Contrary to alkenes, in benzene, substitution and not addition occurs after the electrophilic attack. 
- Substitution regenerates the complete delocalisation of electrons throughout the ring and achieves a higher stability aromatic structure.

## Test yourself on Arenes

- Which of these is NOT evidence to support the aromatic structure of benzene?
- Which of the following would benzene undergo an electrophilic substitution reaction with?

[Practise this topic for free](https://app.senecalearning.com/classroom/course/6c044999-c7c8-4b67-b944-b6da4b0bd02e/section/cb872696-8fa7-4db9-aa8a-72e56f383844/session)

- Previous topic: [3.7.1 Degrees of Substitution](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-7-1-degrees-of-substitution.md)
- Next topic: [3.8.1 Alkanes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-1-alkanes.md)

## Chemistry: IB Diploma Higher Level contents

### 1 Structure - Models of the Particulate of Matter
- 1.1 Introduction to the Particulate Model of Matter
  - [1.1.1 States of Matter](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-1-states-of-matter.md)
  - [1.1.2 Kinetic Molecular Theory](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-2-kinetic-molecular-theory.md)
  - [1.1.3 Simple Sphere](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-3-simple-sphere.md)
  - [1.1.4 Changing State](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-4-changing-state.md)
  - [1.1.5 Forces Between Particles](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-5-forces-between-particles.md)
  - [1.1.6 Changes of State](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-6-changes-of-state.md)
  - [1.1.7 Predicting States](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-7-predicting-states.md)
  - [1.1.8 Changing State HyperLearning](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-8-changing-state-hyperlearning.md)
  - [1.1.9 Ionization Energy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-1-9-ionization-energy.md)
- 1.2 The Nuclear Atom
  - [1.2.1 Fundamental Particles](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-1-fundamental-particles.md)
  - [1.2.2 Isotopes & Mass Number](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-2-isotopes-and-mass-number.md)
  - [1.2.3 Mass Spectrometry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-3-mass-spectrometry.md)
  - [1.2.4 Mass Spectrometry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-4-mass-spectrometry.md)
  - [1.2.5 Mass Spectroscopy - Analysis](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-5-mass-spectroscopy-analysis.md)
  - [1.2.6 Extended Response - Mass Spectrometry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-6-extended-response-mass-spectrometry.md)
  - [1.2.7 Radioactivity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-2-7-radioactivity.md)
- 1.3 Electron Configuration
  - [1.3.1 Electron Shells, Sub-Shells & Orbitals](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-3-1-electron-shells-sub-shells-and-orbitals.md)
  - [1.3.2 Electron Configuration](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-3-2-electron-configuration.md)
  - [1.3.3 Absorption & Emission Spectra](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-3-3-absorption-and-emission-spectra.md)
  - [1.3.4 IB Multiple Choice - Atomic Structure](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-3-4-ib-multiple-choice-atomic-structure.md)
  - [1.3.5 Extended Response - The Atom & Electrons](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-3-5-extended-response-the-atom-and-electrons.md)
- 1.4 Counting Particles by Mass: The Mole
  - [1.4.1 Relative Masses](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-4-1-relative-masses.md)
  - [1.4.2 The Mole](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-4-2-the-mole.md)
  - [1.4.3 IB Multiple Choice -  Moles](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-4-3-ib-multiple-choice-moles.md)
- 1.5 Ideal Gases
  - [1.5.1 Ideal Gas Equation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-5-1-ideal-gas-equation.md)
  - [1.5.2 Gas Laws](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-5-2-gas-laws.md)
  - [1.5.3 IB Multiple Choice - Gases & Kinetics](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-5-3-ib-multiple-choice-gases-and-kinetics.md)
- 1.6 Elements, Compounds & Mixtures
  - [1.6.1 Fundamental Particles](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-1-fundamental-particles.md)
  - [1.6.2 Pure Substances](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-2-pure-substances.md)
  - [1.6.3 Purity & The Law of Definite Proportion](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-3-purity-and-the-law-of-definite-proportion.md)
  - [1.6.4 Mixtures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-4-mixtures.md)
  - [1.6.5 Separating Mixtures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-5-separating-mixtures.md)
  - [1.6.6 IB Multiple Choice - Pure Substances](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-6-ib-multiple-choice-pure-substances.md)
  - [1.6.7 Extended Response - Moles & Pure Substances](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-6-7-extended-response-moles-and-pure-substances.md)
- 1.7 States of Matter & Changes of State
  - [1.7.1 States of Matter](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-7-1-states-of-matter.md)
  - [1.7.2 Particle Diagrams](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-7-2-particle-diagrams.md)
  - [1.7.3 IB Multiple Choice - Solids, Liquids, & Gases](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-7-3-ib-multiple-choice-solids-liquids-and-gases.md)
  - [1.7.4 Balancing Equations & Ionic Equations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-7-4-balancing-equations-and-ionic-equations.md)
  - [1.7.5 Empirical & Molecular Formulas](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-7-5-empirical-and-molecular-formulas.md)
- 1.8 Reacting Masses &. Volumes
  - [1.8.1 Balancing Equations & Ionic Equations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-8-1-balancing-equations-and-ionic-equations.md)
  - [1.8.2 Percentage Yield](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-8-2-percentage-yield.md)
- 1.9 Solutions
  - [1.9.1 Molarity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-9-1-molarity.md)
  - [1.9.2 Particulate Model of Solutions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/1-9-2-particulate-model-of-solutions.md)

### 2 Structure - Models of Bonding & Structure
- 2.1 The Ionic Model
  - [2.1.1 Ionic Bonding](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-1-1-ionic-bonding.md)
- 2.2 The Covalent Model
  - [2.2.1 Covalent Bonds](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-2-1-covalent-bonds.md)
  - [2.2.2 Complex Ions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-2-2-complex-ions.md)
  - [2.2.3 Factors Affecting Covalent Bond Strength](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-2-3-factors-affecting-covalent-bond-strength.md)
  - [2.2.4 Polarity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-2-4-polarity.md)
- 2.3 Covalent Structures
  - [2.3.1 Ionic Lewis Structures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-1-ionic-lewis-structures.md)
  - [2.3.2 Covalent Lewis Structures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-2-covalent-lewis-structures.md)
  - [2.3.3 VSEPR Theory](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-3-vsepr-theory.md)
  - [2.3.4 Resonance Structures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-4-resonance-structures.md)
  - [2.3.5 Allotropes of Carbon](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-5-allotropes-of-carbon.md)
  - [2.3.6 Formal Charge](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-6-formal-charge.md)
  - [2.3.7 End of Topic Quiz - Bonding](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-7-end-of-topic-quiz-bonding.md)
  - [2.3.8 IB Multiple Choice - Bonding & Lewis Structures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-8-ib-multiple-choice-bonding-and-lewis-structures.md)
  - [2.3.9 IB Multiple Choice - Resonance & Formal Charge](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-3-9-ib-multiple-choice-resonance-and-formal-charge.md)
- 2.4 The Metallic Model
  - [2.4.1 Metallic Bonding](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-4-1-metallic-bonding.md)
- 2.5 From Models to Materials
  - [2.5.1 Alloys](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-1-alloys.md)
  - [2.5.2 Properties of Polymers](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-2-properties-of-polymers.md)
  - [2.5.3 Polymerisation Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-3-polymerisation-reactions.md)
  - [2.5.4 Introduction to Alkenes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-4-introduction-to-alkenes.md)
  - [2.5.5 Reactions of Alkenes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-5-reactions-of-alkenes.md)
  - [2.5.6 End of Topic Quiz - Alkenes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-5-6-end-of-topic-quiz-alkenes.md)
- 2.6 Valence Electrons & Ionic Compounds
  - [2.6.1 Valence Electrons & Forming Ions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-6-1-valence-electrons-and-forming-ions.md)
  - [2.6.2 Ionic Compounds](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-6-2-ionic-compounds.md)
  - [2.6.3 End of Topic Quiz - Atoms & Ions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-6-3-end-of-topic-quiz-atoms-and-ions.md)
  - [2.6.4 IB Multiple Choice - Valence & Ions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-6-4-ib-multiple-choice-valence-and-ions.md)
- 2.7 Molecular Shape
  - [2.7.1 VSEPR](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-7-1-vsepr.md)
  - [2.7.2 Molecular Shapes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-7-2-molecular-shapes.md)
  - [2.7.3 Bond Hybridization](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-7-3-bond-hybridization.md)
  - [2.7.4 IB Multiple Choice - VSEPR & Bond Hybridization](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-7-4-ib-multiple-choice-vsepr-and-bond-hybridization.md)
  - [2.7.5 Extended Response - Bonding & Molecular Shape](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-7-5-extended-response-bonding-and-molecular-shape.md)
- 2.8 Intermolecular Forces
  - [2.8.1 Introduction to Intermolecular Forces](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-1-introduction-to-intermolecular-forces.md)
  - [2.8.2 London Dispersion Forces](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-2-london-dispersion-forces.md)
  - [2.8.3 Dipole-Dipole Interactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-3-dipole-dipole-interactions.md)
  - [2.8.4 Ion-Dipole Interactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-4-ion-dipole-interactions.md)
  - [2.8.5 Hydrogen Bonding](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-5-hydrogen-bonding.md)
  - [2.8.6 Large Biomolecules](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-6-large-biomolecules.md)
  - [2.8.7 IB Multiple Choice - Intermolecular Forces](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-7-ib-multiple-choice-intermolecular-forces.md)
  - [2.8.8 Extended Response - Hydrogen Bonding](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/2-8-8-extended-response-hydrogen-bonding.md)

### 3 Structure - Classification of Matter
- 3.1 The Periodic Table: Classification of Elements
  - [3.1.1 The Periodic Table](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-1-the-periodic-table.md)
  - [3.1.2 Trends in the Periodic Table](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-2-trends-in-the-periodic-table.md)
  - [3.1.3 End of Topic Quiz - Periodicity & Trends](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-3-end-of-topic-quiz-periodicity-and-trends.md)
  - [3.1.4 Periodic Trends - Electronegativity & Affinity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-4-periodic-trends-electronegativity-and-affinity.md)
  - [3.1.5 End of Topic Quiz - Periodic Trends](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-5-end-of-topic-quiz-periodic-trends.md)
  - [3.1.6 IB Multiple Choice - Periodic Trends](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-6-ib-multiple-choice-periodic-trends.md)
  - [3.1.7 Extended Response - Periodic Table](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-1-7-extended-response-periodic-table.md)
- 3.2 Periodic Trends
  - [3.2.1 Atomic & Ionic Radii](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-1-atomic-and-ionic-radii.md)
  - [3.2.2 Ionisation & Electronegativity](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-2-ionisation-and-electronegativity.md)
  - [3.2.3 Metallic Behaviour & Oxides](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-3-metallic-behaviour-and-oxides.md)
  - [3.2.4 Period 3 Elements & Oxides](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-4-period-3-elements-and-oxides.md)
  - [3.2.5 Period 3 Oxides](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-5-period-3-oxides.md)
  - [3.2.6 End of Topic Quiz - Period 3](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-6-end-of-topic-quiz-period-3.md)
  - [3.2.7 Periodic Trends: Blocks](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-7-periodic-trends-blocks.md)
  - [3.2.8 Redox Chemistry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-2-8-redox-chemistry.md)
- 3.3 Group 1 Alkali Metals
  - [3.3.1 Alkali Metals](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-3-1-alkali-metals.md)
- 3.4 Halogens
  - [3.4.1 Introduction to Halogens](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-1-introduction-to-halogens.md)
  - [3.4.2 Reactions of Halogens](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-2-reactions-of-halogens.md)
  - [3.4.3 Chlorine & Chlorate(I)](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-3-chlorine-and-chloratei.md)
  - [3.4.4 End of Topic Quiz - Group 7](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-4-end-of-topic-quiz-group-7.md)
  - [3.4.5 Exam-Style Question - Group 7](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-5-exam-style-question-group-7.md)
  - [3.4.6 End of Topic Quiz - Periodicity, Group 2 & 7](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-4-6-end-of-topic-quiz-periodicity-group-2-and-7.md)
- 3.5 Noble gases, group 18
  - [3.5.1 Noble Gases](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-5-1-noble-gases.md)
- 3.6 Functional Groups: Classification of Organic
  - [3.6.1 Nomenclature](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-1-nomenclature.md)
  - [3.6.2 Trends in Physical Properties](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-2-trends-in-physical-properties.md)
  - [3.6.3 Saturated & Unsaturated Hydrocarbons](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-3-saturated-and-unsaturated-hydrocarbons.md)
  - [3.6.4 Nomenclature contd.](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-4-nomenclature-contd.md)
  - [3.6.5 Types of Formulas](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-5-types-of-formulas.md)
  - [3.6.6 Isomerism](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-6-isomerism.md)
  - [3.6.7 Formulae](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-7-formulae.md)
  - [3.6.8 Homologous Series](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-8-homologous-series.md)
  - [3.6.9 Structural Isomers](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-6-9-structural-isomers.md)
- 3.7 Functional Group Chemistry
  - [3.7.1 Degrees of Substitution](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-7-1-degrees-of-substitution.md)
  - [3.7.2 Arenes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-7-2-arenes.md)
- 3.8 Alkanes
  - [3.8.1 Alkanes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-1-alkanes.md)
  - [3.8.2 Fractional Distillation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-2-fractional-distillation.md)
  - [3.8.3 Cracking](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-3-cracking.md)
  - [3.8.4 Combustion](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-4-combustion.md)
  - [3.8.5 Chlorination](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-5-chlorination.md)
  - [3.8.6 End of Topic Quiz - Alkanes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-8-6-end-of-topic-quiz-alkanes.md)
- 3.9 Alcohols
  - [3.9.1 Production of Alcohols](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-1-production-of-alcohols.md)
  - [3.9.2 Oxidation of Alcohols](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-2-oxidation-of-alcohols.md)
  - [3.9.3 Oxidation of Alcohols - 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-3-oxidation-of-alcohols-2.md)
  - [3.9.4 Elimination Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-4-elimination-reactions.md)
  - [3.9.5 End of Topic Quiz - Alcohols](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-5-end-of-topic-quiz-alcohols.md)
  - [3.9.6 Exam-Style Question - Alcohols](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-9-6-exam-style-question-alcohols.md)
- 3.10 Halogenoalkanes
  - [3.10.1 Substitution Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-10-1-substitution-reactions.md)
  - [3.10.2 Elimination Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-10-2-elimination-reactions.md)
  - [3.10.3 Ozone Depletion](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-10-3-ozone-depletion.md)
  - [3.10.4 End of Topic Quiz - Halogenoalkanes](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/3-10-4-end-of-topic-quiz-halogenoalkanes.md)

### 4 Reactivity - What Drives Chemical Reaction?
- 4.1 Endothermic & Exothermic Reactions
  - [4.1.1 Endothermic & Exothermic Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-1-1-endothermic-and-exothermic-reactions.md)
  - [4.1.2 Energy Diagrams](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-1-2-energy-diagrams.md)
  - [4.1.3 Heat Transfer & Thermal Equilibrium](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-1-3-heat-transfer-and-thermal-equilibrium.md)
  - [4.1.4 IB Multiple Choice - Enthalpy & Energy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-1-4-ib-multiple-choice-enthalpy-and-energy.md)
- 4.2 Enthalpy of Reaction, Formation, & Hess' Law
  - [4.2.1 Enthalpy of Reaction](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-1-enthalpy-of-reaction.md)
  - [4.2.2 Bond Enthalpies](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-2-bond-enthalpies.md)
  - [4.2.3 Enthalpy of Formation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-3-enthalpy-of-formation.md)
  - [4.2.4 Hess’ Law](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-4-hess-law.md)
  - [4.2.5 Thermodynamics & Kinetic Control](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-5-thermodynamics-and-kinetic-control.md)
  - [4.2.6 End of Topic Quiz - Thermodynamics](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-6-end-of-topic-quiz-thermodynamics.md)
  - [4.2.7 IB Multiple Choice - Enthalpy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-7-ib-multiple-choice-enthalpy.md)
  - [4.2.8 Extended Response - Enthalpy Change](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-2-8-extended-response-enthalpy-change.md)
- 4.3 Entropy
  - [4.3.1 Introduction to Entropy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-1-introduction-to-entropy.md)
  - [4.3.2 Absolute Entropy  & Entropy Change](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-2-absolute-entropy-and-entropy-change.md)
  - [4.3.3 Free Energy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-3-free-energy.md)
  - [4.3.4 Thermodynamically Favorable Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-4-thermodynamically-favorable-reactions.md)
  - [4.3.5 IB Multiple Choice - Entropy & Free Energy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-5-ib-multiple-choice-entropy-and-free-energy.md)
  - [4.3.6 Extended Response - Free Energy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/4-3-6-extended-response-free-energy.md)

### 5 Reactivity - How Much, How Fast & How Far?
- 5.1 Kinetics
  - [5.1.1 Collision Theory & Rates of Reaction](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-1-1-collision-theory-and-rates-of-reaction.md)
  - [5.1.2 Maxwell-Boltzmann Distribution](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-1-2-maxwell-boltzmann-distribution.md)
  - [5.1.3 Increasing Rates](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-1-3-increasing-rates.md)
  - [5.1.4 End of Topic Quiz - Kinetics](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-1-4-end-of-topic-quiz-kinetics.md)
- 5.2 Rates of Reaction
  - [5.2.1 Rate Equations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-2-1-rate-equations.md)
  - [5.2.2 Rate Equations 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-2-2-rate-equations-2.md)
  - [5.2.3 The Effect of a Catalyst](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-2-3-the-effect-of-a-catalyst.md)
- 5.3 Stoichometry
  - [5.3.1 Stoichiometry](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-3-1-stoichiometry.md)
- 5.4 Le Châtelier’s Principle
  - [5.4.1 Introduction to Le Châtelier’s Principle](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-4-1-introduction-to-le-chateliers-principle.md)
  - [5.4.2 Reaction Quotient & Le Châtelier’s Principle](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-4-2-reaction-quotient-and-le-chateliers-principle.md)
  - [5.4.3 Temperature & Le Châtelier’s Principle](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-4-3-temperature-and-le-chateliers-principle.md)
  - [5.4.4 IB Multiple Choice -Le Châtelier’s Principle](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-4-4-ib-multiple-choice-le-chateliers-principle.md)
  - [5.4.5 Extended Response - Le Châtelier](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-4-5-extended-response-le-chatelier.md)
- 5.5 Introduction to Equilibrium
  - [5.5.1 Equilibrium & Equilibrium Graphs](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-5-1-equilibrium-and-equilibrium-graphs.md)
  - [5.5.2 Dynamic Equilibria](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-5-2-dynamic-equilibria.md)
  - [5.5.3 Reversible Reactions & Directions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-5-3-reversible-reactions-and-directions.md)
- 5.6 Equilibrium Constant
  - [5.6.1 Calculating the Equilibrium Constant](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-1-calculating-the-equilibrium-constant.md)
  - [5.6.2 Magnitude of the Equilibrium Constant](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-2-magnitude-of-the-equilibrium-constant.md)
  - [5.6.3 Properties of the Equilibrium Constant](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-3-properties-of-the-equilibrium-constant.md)
  - [5.6.4 Calculating Equilibrium Concentrations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-4-calculating-equilibrium-concentrations.md)
  - [5.6.5 Representations of Equilibrium](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-5-representations-of-equilibrium.md)
  - [5.6.6 IB Multiple Choice - Equilibrium Constants](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-6-ib-multiple-choice-equilibrium-constants.md)
  - [5.6.7 Extended Response - Calculating Kc](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-6-7-extended-response-calculating-kc.md)
- 5.7 Reaction Quotient & Equilibrium Constant
  - [5.7.1 Reaction Quotient](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-1-reaction-quotient.md)
  - [5.7.2 Equilibrium Constants](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-2-equilibrium-constants.md)
  - [5.7.3 Partial Pressures](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-3-partial-pressures.md)
  - [5.7.4 Kp](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-4-kp.md)
  - [5.7.5 IB Multiple Choice - Reaction Quotient & Kp](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-5-ib-multiple-choice-reaction-quotient-and-kp.md)
  - [5.7.6 Extended Response - Kp & Bond Enthalpy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/5-7-6-extended-response-kp-and-bond-enthalpy.md)

### 6 Reactivity - The Mechanisms of Chemical Change
- 6.1 Proton Transfer Reactions
  - [6.1.1 Brønsted-Lowry Theory](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-1-1-bronsted-lowry-theory.md)
- 6.2 The pH Scale
  - [6.2.1 pH & pOH](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-2-1-ph-and-poh.md)
  - [6.2.2 Ionic Product of Water](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-2-2-ionic-product-of-water.md)
  - [6.2.3 Using Kw](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-2-3-using-kw.md)
  - [6.2.4 IB Multiple Choice - pH & Kw](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-2-4-ib-multiple-choice-ph-and-kw.md)
  - [6.2.5 Extended Response - Kw](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-2-5-extended-response-kw.md)
- 6.3 Strong & Weak Acids and Bases
  - [6.3.1 Strong Acids & Bases](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-3-1-strong-acids-and-bases.md)
  - [6.3.2 Weak Acids & Ka](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-3-2-weak-acids-and-ka.md)
  - [6.3.3 Weak Bases & Kb](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-3-3-weak-bases-and-kb.md)
  - [6.3.4 Weak Acids & Bases Calculation Walkthrough](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-3-4-weak-acids-and-bases-calculation-walkthrough.md)
- 6.4 Acid Deposition
  - [6.4.1 Acid Deposition](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-4-1-acid-deposition.md)
- 6.5 Types of Organic Reactions
  - [6.5.1 Electrophilic Substitution](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-5-1-electrophilic-substitution.md)
- 6.6 Oxidation & Reduction
  - [6.6.1 Oxidation Number Method](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-1-oxidation-number-method.md)
  - [6.6.2 Winkler Method](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-2-winkler-method.md)
  - [6.6.3 Redox Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-3-redox-reactions.md)
  - [6.6.4 Oxidation States & Equations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-4-oxidation-states-and-equations.md)
  - [6.6.5 End of Topic Quiz - Redox](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-5-end-of-topic-quiz-redox.md)
  - [6.6.6 Extended Response - Redox Reactions](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-6-6-extended-response-redox-reactions.md)
- 6.7 Electrochemical Cells
  - [6.7.1 Introduction to Electrochemical Cells](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-7-1-introduction-to-electrochemical-cells.md)
  - [6.7.2 Galvanic Cells](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-7-2-galvanic-cells.md)
  - [6.7.3 Cell Notation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-7-3-cell-notation.md)
  - [6.7.4 Electrolytic Cells](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-7-4-electrolytic-cells.md)
  - [6.7.5 Extended Response - Voltaic Cells & Redox](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-7-5-extended-response-voltaic-cells-and-redox.md)
- 6.8 Titration
  - [6.8.1 Redox Titrations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-8-1-redox-titrations.md)
  - [6.8.2 Titration Calculations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-8-2-titration-calculations.md)
  - [6.8.3 Atom Economy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-8-3-atom-economy.md)
- 6.9 Acid-Base Titrations
  - [6.9.1 Titration Calculation Weak Acid & Strong Base](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-1-titration-calculation-weak-acid-and-strong-base.md)
  - [6.9.2 Titration Experimental Detail](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-2-titration-experimental-detail.md)
  - [6.9.3 Extended Response - Titration](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-3-extended-response-titration.md)
  - [6.9.4 Titration Calculations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-4-titration-calculations.md)
  - [6.9.5 Titration Curves](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-5-titration-curves.md)
  - [6.9.6 Titration Calculation Strong Acid & Weak Base](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-6-titration-calculation-strong-acid-and-weak-base.md)
  - [6.9.7 IB Multiple Choice - Titrations](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-7-ib-multiple-choice-titrations.md)
  - [6.9.8 Polyprotic Acids](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-8-polyprotic-acids.md)
  - [6.9.9 Titration Calculations Strong Acid & Strong Base](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-9-titration-calculations-strong-acid-and-strong-base.md)
  - [6.9.10 Titrations Curves 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/6-9-10-titrations-curves-2.md)

### 7 Measurement, Data Processing & Analysis
- 7.1 Uncertainties & Errors in Measurements & Results
  - [7.1.1 Qualitative & Quantitative data](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-1-1-qualitative-and-quantitative-data.md)
- 7.2 Graphical Techniques
  - [7.2.1 Drawing & Interpreting Graphs](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-2-1-drawing-and-interpreting-graphs.md)
  - [7.2.2 Linear Interpolation](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-2-2-linear-interpolation.md)
- 7.3 Spectroscopic Identification of Organic Compounds
  - [7.3.1 Understanding NMR](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-3-1-understanding-nmr.md)
  - [7.3.2 Carbon-13 NMR](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-3-2-carbon-13-nmr.md)
  - [7.3.3 Hydrogen-1 NMR](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-3-3-hydrogen-1-nmr.md)
  - [7.3.4 Hydrogen-1 NMR 2](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-3-4-hydrogen-1-nmr-2.md)
  - [7.3.5 End of Topic Quiz - NMR](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-3-5-end-of-topic-quiz-nmr.md)
- 7.4 Infrared Spectroscpy
  - [7.4.1 Infrared Spectroscopy](https://senecalearning.com/en-gb/revision-notes/ib-diploma/chemistry/chemistry-ib-diploma-higher-level/7-4-1-infrared-spectroscopy.md)