electrolysis

• why is carbon graphite used for the electrodes

  as they are unreactive
• why can't the electrodes touch

  as that would produce a short circuit
• positive is..

  anode
• negative is...

  cathode
• if the metal is less reactive than hydrogen, then what is discharged at the cathode

  the metal
• name an example of a metal that is discharged at the cathode

  copper
• whenever the electrolysis contains a halide ion, what is discharged at the anode

  a halogen
• what can be used to prove chlorine is present

  damp blue litmus paper which goes from blue to clear