Chemistry: Metals and their uses

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  • Metals and their issues
    • Extracting metals
      • Rocks that conatin enough metals  or a metal compound is called an ORE.
      • Displacement: extracting a compound with a more reactive element.
      • Reduction: carbon removes the oxygen from the oxide to produce the metal
    • Iron and Steel
      • iron in ores are extracted by a blast furnace.
        • 96% iron produced
      • Iron is used to make steel. Steel are alloys of iron.
      • Low carbon steels are easily shaped and high-carbon steels are hard
    • Aluminium and Titanium
      • Aluminium has a low density. restistant to corrosion
        • Extracted by electrolysis
          • High temperatures and lots of electricity. This makes it very expensive to extract. I
            • It is weak on its own
      • Aluminium is more reactive than carbon
      • Titanium: Resistant to corrosion. Very strong. Low density
        • Reduced by carbon, but makes it brittle
          • Expensive to extracts.
    • Extracting Copper
      • Extracted by smelting
      • Phytomining: Plants to absorb copper compounds from the ground. Plants are burned to produce ash, from which copper can be expracted.
      • Bioleaching: Bacteria to produce solutions containing copper compounds
    • Useful metals
      • Periodic Table
        • Central block: Transitional metals
          • Good conductors of electricity
          • Strong but can be bent


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