Reactivity Series

• What is rusting?


   the corrosion of iron in the presence of water and oxygen from the air:
• What are the methods to prevent rusting?


  Coating, painting, galvanizing
• What is galvanising?


  a process where the iron to be protected is coated with a layer of zinc
• What gases are produced when a metal reacts with water?

  hydroxide ion and hydrogen gas
• Which metals react more slowly?


  metals just below calcium
• Which metals don't react with water?


  silver, copper and gold
• The more reactive elements will...


  react more vigorously.
• Why do metals react which acids?


  To form a salt and hydrogen
• What is a displacement?


  A more reactive metal will place a less reactive metal from its compunds
• Displacement reactions occur between...


  a more reactive metal and the oxide of a less reactive metal
• where do redox reactions occur?


  when oxidation and reduction occurs at the same time
• What is oil rig?

  -oxidation

  -is

  -loss of electrons

  -reduction

  -is

  -gain
• What is a universal indicator?


  operates across a broad pH range and gives an approximate value for PH
• Acids contain..


  hydrogen ions
• Acids turn litmus paper


  red
• Alkalis contain


  hydroxide ions
• Alkalis turn methyl orange..


  yellow
• What is neutralisation?


  Occurs when an acid reacts with an alkali