Extracting Metals

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  • Extracting Metals
    • Displacement Reactions
      • A more reactive metal will displace a less reactive metal from a comound
    • Carbon (by reduction)
      • all metals below carbon and above hydrogen
    • In their native state so do not need to be extracted
      • all metals below hydrogen
    • Extracting Iron with a Blast Furnace
      • 1. Iron Ore, Limestone and Coke (carbon) are added
        • 2. Hot air is added (O2) which reacts with coke to form CO2
          • 3. CO2 reacts with more coke and forms carbon monoxide (2CO)
            • 4. Carbon displaces the Iron. Limestone reacts with impurities to form slag (used for roads)
    • phytomining
      • 1.plants grown in copper rich soil which builds up on the leaves.
        • 2. plants are harvested and burnt. Copper is collected from the ash
    • Bioleaching
      • Bacteria separates copper from copper sulfide
        • the leachate (solution produced by process) contains copper which is extracted by filtering
    • A metal alloy is a mix of two metals or a metal and a non metal. They are harder than pure metals
      • eg iron and carbon=steel
        • Here the smaller carbon atoms upset the layers of pure iron atoms so it's harder for them to slide over each other
        • Low carbon steel is easily shaped
        • high carbon steel is hard
        • stainless steel is resistant to corrosion

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