18.2 galvanic cells

Cards (15)

  • galvanic cells are used for spontaneous reactions
  • a reducing agent causes other things to be reduced
  • an oxidizing agent causes other things to be oxidized
  • Zn(s) + Cu2+(aq) -> Zn2+ (aq) + Cu(s)
    • Zn is oxidized
    • Cu2+ is reduced
    • Zn is the reducing agent
    • Cu2+ is the oxidizing agent
  • the anode is where oxidation occurs
  • the cathode is where reduction occurs
  • anode II cathode
  • single line between phases
  • electrodes first and last
  • cannot create a cell without a solid metal electrode
  • difference in electrical potential between the anode and cathode is called the cell voltage
  • hydrogen electrodes have a potential of zero
  • the standard hydrogen electrode is used as reference point to measure other voltages
  • E° = standard reduction potential = voltage reduction rxn at standard conditions
  • voltage is independent of amount