reduction and oxidation of electrons

• What should you be able to explain by the end of the video?

  Oxidation and reduction in terms of electrons
• What happens in a displacement reaction?

  A more reactive element displaces a less reactive one
• In the reaction of magnesium and iron oxide, what happens to the iron atoms?

  They are reduced as they lose oxygen
• How is oxidation defined in terms of electrons?

  Oxidation is the loss of electrons
• How is reduction defined in terms of electrons?

  Reduction is the gain of electrons
• What happens to a magnesium atom when it forms a magnesium ion?

  It loses two electrons
• What is a half equation?

  An equation showing oxidation or reduction
• What happens to a sulfur atom when it gains two electrons?

  It is reduced to form a sulfide ion
• What mnemonic can help remember oxidation and reduction definitions?

  • Oil Rig
  • Oxidation is Loss of electrons
  • Reduction is Gain of electrons
• In the half equation of aluminum losing three electrons, what type of reaction is it?

  Oxidation reaction
• In the half equation of oxygen gaining two electrons, what type of reaction is it?

  Reduction reaction
• In the reaction of zinc with copper sulfate, what happens to zinc?

  Zinc is oxidized to form zinc ions
• In the reaction of copper sulfate with zinc, what happens to copper?

  Copper is reduced to form copper atoms
• What is the product of zinc reacting with copper sulfate?

  Zinc sulfate and copper
• What do you need to know to identify oxidation and reduction in symbol equations?

  The ions present in the reaction