C1.3 - Metals And Their Uses Flashcards
What type of reaction occurs in the blast furnace?
Reduction.
How can metals more reactive than carbon be extracted?
Electrolysis.
What is the downside of electrolysis?
It uses a lot of energy and therefore it is expensive.
What percentage of iron is there in iron obtained from the blast furnace?
96%.
Electrolysis can be used to… (2)
- Purify metals.
2. Extract metals.
What is phytomining?
Using plants to absorb compounds, and then burning them to produce an ash containing copper.
What is bioleaching?
Using bacteria to produce a leachate solution containing copper.
Why are aluminium and titanium useful? (4)
- Non-corrosive.
- Titanium - high tensile strength.
- Low density.
- Aluminium - forms hard, strong alloys.
Why should we recycle metals? (4)
- Reduces pollution.
- Conserves non-renewable sources.
- Reduces the amount of waste sent to landfill sites.
- Saves energy and therefore money.
Low carbon steel is ___ and used as ___.
Soft/easily-shaped, car bodies.
High carbon steel is ___ and used as ___.
Hard, blades for cutting tools/bridges.
Stainless steel is ___ and used as ___.
Corrosive-resistant, cutlery/containers for corrosive substances.
What are the properties of transition metals? (5)
- High melting points.
- Strong.
- High density.
- Low reactivity.
- High boiling points.
What are the properties of most metals? (3)
- Strong.
- Good conductors of heat.
- Good conductors of electricity.
What does a metal have to be in order for it to be extracted in the blast furnace?
Less reactive than carbon.