Study Notes
Alkanes are saturated hydrocarbons with single covalent bonds, making them generally unreactive except for combustion and substitution reactions.
- Saturated Hydrocarbons — hydrocarbons with only single covalent bonds. Example: Methane is a simple alkane with single bonds.
- Combustion — a chemical reaction where a substance burns in oxygen. Example: Alkanes burn to produce carbon dioxide and water.
- Substitution Reaction — a reaction where one atom is replaced by another. Example: Alkanes react with chlorine in the presence of UV light to form chlorinated products.
Exam Tips
Key Definitions to Remember
- Saturated Hydrocarbons: Hydrocarbons with only single covalent bonds.
- Combustion: A reaction where a substance burns in oxygen to produce carbon dioxide and water.
- Substitution Reaction: A reaction where one atom is replaced by another.
Common Confusions
- Confusing saturated with unsaturated hydrocarbons.
- Misunderstanding the role of UV light in substitution reactions.
Typical Exam Questions
- What are the products of complete combustion of alkanes? Carbon dioxide and water.
- What is a substitution reaction? A reaction where one atom is replaced by another.
- How do alkanes react with chlorine? In the presence of UV light, alkanes undergo substitution reactions with chlorine.
What Examiners Usually Test
- Understanding of saturated hydrocarbons and their properties.
- Ability to describe substitution reactions with halogens.
- Knowledge of the products of combustion of alkanes.