Extractions of Metals

• What is the process of gaining oxygen called?

  Oxidation
• What happens when magnesium is combined with oxygen?

  It forms magnesium oxide, indicating oxidation of magnesium
• What is reduction in terms of oxygen?

  Reduction is the loss of oxygen
• What occurs when magnesium oxide is broken down?

  It results in magnesium and oxygen, indicating reduction of magnesium
• Why do most metals oxidize when exposed to oxygen?

  Because they are fairly reactive with oxygen
• What is iron oxide commonly known as?

  Rust
• Why do unreactive metals like gold often exist as pure metals?

  Because they are too unreactive to react with oxygen
• What is the most common bonding element for metals found in nature?

  Oxygen
• What is the process used to remove oxygen from metal oxides?

  Reduction
• How can metal oxides be reduced to obtain pure metals?

  By using carbon to take the oxygen from the metal oxides
• What does carbon form when it takes oxygen from metal oxides?

  Carbon dioxide
• Which metals can be extracted using the reduction with carbon technique?

  Zinc, iron, and copper
• Why can't all metals be extracted using carbon reduction?

  Only metals that are less reactive than carbon can be extracted this way
• What is the alternative method for extracting more reactive metals?

  Electrolysis
• What is required for the process of electrolysis?

  A large amount of energy
• What is the most common iron ore?

  Fe₂O₃
• What is the goal when reducing iron oxide?

  To isolate pure iron
• What is the balanced equation for reducing Fe₂O₃ with carbon?

  Fe₂O₃ + C → Fe + CO₂
• What is necessary to supply during the reduction of iron oxide with carbon?

  Some heat
• What is the outcome of the reduction of Fe₂O₃ with carbon?

  It forms pure iron and carbon dioxide