Electrolysis Part 1

Cards (21)

  • What is the main topic of today's video?
    Electrolysis
  • What does electrolysis allow us to do with ionic compounds?
    Separate the elements in insoluble ionic compounds
  • What is an electrolyte?
    A liquid or solution containing ionic compounds
  • Why must the ions in the electrolyte be free to move?
    To allow for the conduction of electricity
  • How would you prepare an electrolyte from copper sulfate?
    Dissolve it in water
  • What must be done to lead bromide to use it in electrolysis?
    It must be melted to become molten
  • What ions are present in molten lead bromide?
    Positive lead ions and negative bromide ions
  • What are the electrodes made of?
    Metal or carbon
  • What is the positive electrode called?
    Anode
  • What is the negative electrode called?
    Cathode
  • Why do we need a power supply in electrolysis?
    To drive the flow of electrons
  • What does the term electrolysis literally mean?
    Splitting up with electricity
  • What happens to bromide ions at the anode?
    They are oxidized to form bromine gas
  • What is produced when bromide ions are discharged?
    Bromine gas
  • What happens to lead ions at the cathode?
    They are reduced to form pure lead
  • What is the result of lead ions being discharged?
    Formation of pure lead at the bottom
  • What is happening to the electrons during electrolysis?
    They are transferred from negative to positive ions
  • How do bromide ions contribute to the electrolysis process?
    They provide electrons to the anode
  • What overall process occurs during electrolysis of molten lead bromide?
    Electricity converts ions to elemental forms
  • What are the steps involved in the electrolysis of molten lead bromide?
    1. Prepare molten lead bromide as electrolyte.
    2. Connect electrodes: anode (positive) and cathode (negative).
    3. Apply electric current using a power supply.
    4. Bromide ions oxidized at anode to form bromine gas.
    5. Lead ions reduced at cathode to form pure lead.
  • What will the next videos cover after electrolysis of lead bromide?
    • Electrolysis of metal oxides to extract pure metal
    • Electrolysis of aqueous solutions