Study Notes
Metals are extracted from their ores using different methods based on their reactivity. Less reactive metals than carbon can be extracted by reduction with carbon, while more reactive metals require electrolysis. Recycling metals is important due to the finite nature of metal ores and offers environmental and economic benefits.
Exam Tips
Key Definitions to Remember
- Reactivity Series — A list of metals arranged in order of decreasing reactivity.
- Reduction with Carbon — A method to extract metals less reactive than carbon by heating with carbon.
- Electrolysis — A process that uses electricity to extract metals from their ores.
Common Confusions
- Confusing the reactivity series order and using the wrong extraction method.
- Mistaking alloys for compounds; alloys are mixtures, not chemically combined.
Typical Exam Questions
- How is iron extracted from its ore? By reduction with carbon in a blast furnace.
- Why is electrolysis used to extract aluminium? Because aluminium is more reactive than carbon.
- What are the advantages of recycling metals? It saves energy, reduces waste, and conserves raw materials.
What Examiners Usually Test
- Understanding of the reactivity series and its impact on extraction methods.
- Differences between pure metals and alloys.
- The environmental and economic benefits of recycling metals.