Separating metals from metal oxides

Cards (22)

  • What is the process of gaining oxygen called?
    Oxidation
  • What happens when magnesium combines with oxygen?
    It forms magnesium oxide through oxidation
  • What does reduction refer to in chemical terms?
    Loss of oxygen from a compound
  • What is produced when magnesium oxide is reduced?
    Magnesium and oxygen
  • Why do most metals oxidize when exposed to oxygen?
    Because they are fairly reactive with oxygen
  • What is iron oxide commonly known as?
    Rust
  • Why do unreactive metals like gold remain pure?
    They are too unreactive to oxidize
  • What is the most common bonding element for metals?
    Oxygen
  • How can we remove oxygen from metal oxides?
    By reducing them to get pure metals
  • What is the cheapest way to reduce metal oxides?
    Using carbon
  • What does carbon do in the reduction of metal oxides?
    It takes oxygen to form carbon dioxide
  • What is produced when copper oxide reacts with carbon?
    Copper and carbon dioxide
  • Why can't we use carbon to extract all metals?
    Only less reactive metals can be reduced
  • What is the process called for extracting more reactive metals?
    Electrolysis
  • What is a common ore of iron?
    Fe2_2O3_3
  • How do we isolate pure iron from iron oxide?
    By reducing Fe2_2O3_3 with carbon
  • What is the balanced equation for reducing Fe2_2O3_3 with carbon?

    Fe2_2O3_3 + C → Fe + CO2_2
  • What do we need to supply to reduce iron oxide?
    Heat
  • What happens to carbon during the reduction of metal oxides?
    Carbon is oxidized as it gains oxygen
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  • What are the key concepts of oxidation and reduction?
    • Oxidation: gaining oxygen
    • Reduction: losing oxygen
    • Metals oxidize when reactive with oxygen
    • Unreactive metals remain pure
  • What is the process of extracting metals from their oxides?
    1. Identify metal oxide
    2. Use carbon for reduction if less reactive
    3. Apply heat to facilitate reaction
    4. Collect pure metal and carbon dioxide