AQA GCSE Chemistry Unit 1 3.1 Extracting metals

HideShow resource information
View mindmap
  • Ore
    • Rock containing enough metal to make it economical to extract
    • Ore is mined
      • Opencast mining
      • Undergound mining
      • Ore may be concentrated
        • (removal of waste rock)
        • Metal extracted
          • Unreactive metals e.g Gold, are found in the earth as the metal itself
          • METALS LESS REACTIVE THAN CARBON-Extracted by reduction with Carbon in a blast furnace (smelting)
            • For example with Metal Oxides the reducing agent (carbon) is added to displace the metal from its compound
              • Oxidation- reaction with oxygen
              • Reduction- removal of oxygen
            • Expensive as a lot of energy is required
              • METALS MORE REACTIVE THAN CARBON- electrolysis- the extraction of metals from molten compounds
                • Electrolysis purifies copper after smelting
                  • NEW WAYS OF EXTRacTING COPPER
                    • Phytomining- Plants absorb metal compounds. The plants are burnt and their ash contains metal compounds
                    • Bioleching- Bacteria produces leachate solutions that contain metal compunds
              • We should recycle metals as extracting them uses limited resources and is expensive
            • More reactive than carbon metals cannot be extracted from their oxides as it is too expensive because
              • -There are many stages in the process
                • Heated until metal is melted
                  • Electrolysis
              • A lot of energy is required
          • METALS MORE REACTIVE THAN CARBON- electrolysis- the extraction of metals from molten compounds
            • Electrolysis purifies copper after smelting
              • NEW WAYS OF EXTRacTING COPPER
                • Phytomining- Plants absorb metal compounds. The plants are burnt and their ash contains metal compounds
                • Bioleching- Bacteria produces leachate solutions that contain metal compunds

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Metals, metal ores and alloys resources »