C1 Flashcards
What is the issue of using smelting as a way of extracting copper from copper-rich ores?
Smelting produces impure copper which has to be purified using electrolysis.
Give an example of a metal that is more reactive than copper to displace the copper.
Scrap iron
What are the main features of the transition metals?
- Similar properties
- Good heat conductors
- Good electricity conductors
- Strong
- Malleable
- Ductile
Which metals are soft and easily bent when pure?
- Gold
- Aluminium
- Copper
- Iron
Name three types of steel and give an important property for each one.
- Low-carbon steel - easily shaped
- High- carbon steel - hard
- Stainless steel - corrosion resistant
Why are all steels alloys?
- All steels contain iron and carbon
* Mixtures of metal with at least one other element
Give three properties that make aluminium a useful metal.
- Low density
- Malleable
- Ductile
- Corrosion resistant
Give three reasons why titanium is expensive.
- Extraction needs several stages
- Large amount of energy needed
- Cannot be extracted using carbon
Suggest three reasons why we should recycle iron and steel.
- Save iron and steel
- Reduces mining
- Reduces amount of waste going to landfill sites
How is phytomining used to make copper?
- Plants absorb copper compounds from ground
- Plants are burnt
- Ash is produced
- Copper extracted from ash
How is bioleaching used to make copper?
- Uses bacteria
- Produce solutions containing copper
- Copper is electrolysed from solution
- Or iron can be added to make copper
Why isn’t titanium oxide reduced by carbon?
The metal reacts with carbon, making it brittle.
