chemistry

  • Created by: Thomas VP
  • Created on: 19-10-18 12:31
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  • chemistry
    • electrolysis
      • strong acid= fully ionises in water
      • weak acid= partially ionises in water
      • cation= positively charged ion +
        • +VE CHARGED IONS MOVE TO THE NEGATIVE ELECTRODE (CATHODE)
          • -VE CHARGED IONS MOVE TO THE POSITIVE ELECTRODE(ANODE)
            • 'OIL RIG'
              • OXIDATION IS LOSING ELECTRONS
              • REDUCTION IS GAINING ELECTRONS
            • ELECTRODE
          • ELECTRODE
      • anion= negatively charged ion -
        • +VE CHARGED IONS MOVE TO THE NEGATIVE ELECTRODE (CATHODE)
          • -VE CHARGED IONS MOVE TO THE POSITIVE ELECTRODE(ANODE)
            • 'OIL RIG'
              • OXIDATION IS LOSING ELECTRONS
              • REDUCTION IS GAINING ELECTRONS
      • IONIC SOLID are FIXED and cannot move
        • IONIC SUBSTANCE that is MOLTEN or in a SOLUTION are free to move
      • METALS above CARBON are extracted by electrolysis
        • METALS below CARBON are extracted by reduction with carbon
    • ENERGY CHANGE IN REACTIONS
      • EXOTHERMIC= a reaction where energy is GIVEN OUT
        • ENDOTHERMIC= a reaction where energy is TAKEN IN
          • eg. thermal decomposition
        • eg. combustion, neutralisation, oxidation reactions, displacement reactions

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