4.3.2 Electrolysis of molten ionic compounds

• Ions in solid ionic compounds cannot move freely.


  True
• Molten ionic compounds are heated to their melting point.
• The anode in an electrolysis cell is connected to the positive terminal of the power supply.


  True
• Ions in molten ionic compounds are free to move, unlike in solid compounds.


  True
• Molten ionic compounds are formed when ionic compounds are heated to their melting point.
• What is the ion mobility like in molten ionic compounds?

  High ion mobility
• Electrical conductivity in molten ionic compounds requires the application of a potential difference.


  True
• The first step in setting up the electrolysis apparatus is to obtain an electrolysis cell.
• Steps to set up an electrolysis apparatus

  1️⃣ Obtain an electrolysis cell

  2️⃣ Connect to a power supply

  3️⃣ Insert the electrodes

  4️⃣ Apply a potential difference
• The charge on an ion is determined by the number of electrons it gains or loses to achieve a stable electron configuration.
• What type of reaction occurs at the anode during electrolysis?

  Oxidation
• During electrolysis of molten ionic compounds, positive ions are reduced to form metals.
• Molten ionic compounds are ionic compounds that have been heated to their melting point
• Match the state of ionic compounds with their properties:

  Solid ↔️ Poor conductivity

  Molten ↔️ Good conductivity
• Steps to set up the electrolysis apparatus

  1️⃣ Connect the power source

  2️⃣ Arrange the electrodes

  3️⃣ Prepare the electrolyte
• Which ions are present in molten sodium chloride (NaCl)?

  Na+ and Cl-
• What are molten ionic compounds?

  Ionic compounds in liquid state
• In molten ionic compounds, ions are locked in a rigid crystal lattice.

  False
• Molten ionic compounds are good conductors of electricity
• Why are solid ionic compounds poor conductors of electricity?

  Ions cannot move freely
• In electrolysis, electrodes must be made of inert materials like graphite or platinum.


  True
• What ions are present in molten sodium chloride (NaCl)?

  Na+ and Cl-
• Cations are positively charged because they lose electrons.


  True
• Reduction occurs at the cathode because negative ions gain electrons.


  True
• What product is formed at the cathode during the electrolysis of molten sodium chloride?

  Sodium metal