electrolysis

• products colors

  • Hydrogen, oxygen: colorless bubble
  • Clorine - pale green gas
  • Lead(II) bromide - Bromine gas brown vapor. solid lead sink - silver liquid, shiny, grey
• electrolysis define, electrolyte

  • breakdown of molten, aq ionic compound by passing electricity
  • electrolyte: molten, aq ionic compound
  • electrode: current is passed
• predict product

  • neg cathode - less reactive produced. (metal -> pure. H+ -> hydrogen)
  • pos anode - high conc halide produced -> halogen gas. (non-metal. OH- -> oxygen)
• Ar


  average mass of isotopes of element compared to 1/12 of mass of 12C