Edexcel C1 Topic 4

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Author:
HLHSscience
ID:
216617
Filename:
Edexcel C1 Topic 4
Updated:
2013-04-29 15:50:59
Tags:
Edexcel Chemistry Topic
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Description:
Obtaining and using metals
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  1. What is the definition of an ore?
    A rock from which metal can be extractedextracted
  2. What does oxidation mean?
    Gaining oxygen
  3. What does reduction mean?
    The loss of oxygen
  4. Which method is used to extract Iron and why?
    Heating with carbon because it is less reactive than carbon
  5. Which method is used to extract aluminium and why?
    Electrolysis because it is more reactive than carbon
  6. Give the property of aluminium that makes it good for aircrafts
    Low density
  7. Give the property of copper that makes it good for electrical wiring
    A good electrical conductor
  8. Give the property of gold which makes it good for jewellery
    It doesn't react
  9. Give the property of copper that makes it good for plumbing
    It is unread riveunread rive
  10. What is the definition of an alloy?
    A mixture of metals
  11. Why are pure metals soft?
    The atoms are the same size, they are arranged in layers and can slide over each other easily
  12. Why are alloys hard?
    The atoms are different sizes, the layers are distorted and they cannot slide over each other easily
  13. What is a smart alloy?
    An alloy which returns to its original shape on heating
  14. Why should we recycle metals?
    • Conserves the metal ore
    • Less waste so landfill does not fill up as quick
    • Uses less energy

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