Elecr

• What equipment is necessary for performing electrolysis?

  A beaker, electrodes, and a power supply are necessary.
• What is an electrolyte?

  An electrolyte is a liquid or solution that contains an ionic compound with free-moving ions.
• How would you prepare an electrolyte from a soluble compound like copper sulfate?

  You would dissolve it in water
• What must you do to prepare an electrolyte from an insoluble compound like lead bromide?

  You must melt it to create a molten liquid.
• What ions are present in molten lead bromide?

  Positive lead ions and negative bromide ions.
• What are the electrodes made of in electrolysis?

  Electrodes are solid conductors generally made of metal or carbon.
• What is the positive electrode called?

  The positive electrode is called the anode.
• What is the negative electrode called?

  The negative electrode is called the cathode.
• What is the purpose of the power supply in electrolysis?

  The power supply drives the flow of electrons between the electrodes.
• What does the term electrolysis literally mean?

  It literally means splitting up with electricity.
• What is formed when bromide ions are discharged at the anode?

  Bromine gas is formed when bromide ions are discharged.
• What happens to the positive lead ions during electrolysis?

  They are attracted to the negative cathode and are discharged to form pure lead.
• What is produced at the cathode during the electrolysis of molten lead bromide?

  Pure lead is produced at the cathode.
• What does oxidation mean in the context of electrolysis?

  Oxidation means losing electrons, as seen with bromide ions at the anode.
• What does reduction mean in the context of electrolysis?

  Reduction means gaining electrons, as seen with lead ions at the cathode.
• How do electrons move during the electrolysis process?

  Electrons move from the negative bromide ions to the positive lead ions through the wire.
• What is the overall process of electrolysis in this context?

  • Electricity is used to convert ions in a compound into their pure elemental forms.
  • Negative ions lose electrons at the anode (oxidation).
  • Positive ions gain electrons at the cathode (reduction).
• What will be covered in the next two videos following this one?

  1. Electrolysis of metal oxides to extract pure metal.
  2. Electrolysis of aqueous solutions.