redox and electrolysis

• redox


  where oxidation and reduction both happen at the same time
• oxidation


  gain of oxygen, loss of electrons
• reduction


  loss of oxygen, gain of electrons
• negative electrode


  cathode
• positive ions


  cations
• positive electrode


  anode
• negative ions


  anion
• at the anode


  oxidation occurs
• at the cathode


  reduction occurs
• electrolysis 


  breaking down of a substance using electricity
• what does it have to be in order to happen

  molten or aqueous
• In aqueous, at the cathode..


  hydrogen is there, the less reactive one will be in the half equation
• Positive

  Anode

  Negative

  Is

  Cathode
• at the cathode 


  least reactive will be discharged (in half equation)
• at anode


  if a halide is present then that will be discharged
• reducing agent


  what loses electrons
• oxidising agent


  what gains electrons
• anode attracts


  anions
• cathode attracts


  cations
• Cathode


  also has hydrogen in an aqueous solution

  least reactive is discharged
• cathode

  where reduction occurs
• anode


  where oxidation occurs
• anode


  oxygen is there too in aqueous solutions

  halogen will be given off if present
• ore


  rock which contains a good amount of metal which will make profit