IGCSE CHEMISTRY 0620 LESSON 13 EXPLANATION

• LESSON 13

  
  

  
  
  

  10.3 Extraction of metals

  Describe the ease in obtaining metals from their ores by relating the elements to the reactivity seriesDescribe and state the essential reactions in the extraction of iron from hematiteDescribe the conversion of iron into steel using basic oxides and oxygenKnow that aluminium is extracted from the ore bauxite by electrolysisDiscuss the advantages and disadvantages of recycling metals, limited to iron/steel and aluminium

  
  

  
  

  • Describe in outline, the extraction of zinc from zinc blende• Describe in outline, the extraction of aluminium from bauxite including the role of cryolite and the reactions at the electrodes

  
  

  
  

  
  
  

  10.4 Uses of metals
• Name the uses of aluminium:

–  in the manufacture of aircraft because of its

strength and low density

• –  in food containers because of its resistance to corrosion
• Name the uses of copper related to its properties (electrical wiring and in cooking utensils)
• Name the uses of mild steel (car bodies and machinery) and stainless steel (chemical plant and cutlery)

• Explain the uses of zinc for galvanising and for making brass
• Describe the idea of changing the properties of iron by the controlled use of additives to form steel alloys