electrolysis

• What is the aim of electrolysis in this context?

  To determine the products made
• What is the method for performing electrolysis with a salt solution?

  • Place carbon electrodes in the salt solution
  • Ensure electrodes do not touch
  • Connect to a battery or power supply
  • Identify negative electrode as cathode
  • Identify positive electrode as anode
• What ions are present in the solution during electrolysis?

  H⁺ and OH^- ions
• What additional ions are present in sodium chloride solution?

  Na⁺ and Cl^- ions
• What happens if the metal ion is more reactive than hydrogen?

  It stays in solution; hydrogen is reduced
• What is produced at the cathode if the metal ion is less reactive than hydrogen?

  The metal is reduced instead
• What occurs at the anode if the non-metal ion is a halide?

  It is oxidized at the anode
• What is produced at the anode if the non-metal ion is not a halide?

  Oxygen gas is made at the anode