C6 - Electrolysis

• What is the process of electrolysis?

  Electrolysis is the splitting up of substances using electricity.
• What is the term for the electrode where reduction occurs during electrolysis?

  Cathode
• What does the term "reduced" refer to in electrolysis?

  It refers to the gain of electrons by an ion.
• What is the term for the electrode where oxidation occurs during electrolysis?

  Anode
• How do electrodes function in electrolysis?

  Electrodes are solid conductors of metal that allow electrons to flow.
• What is the role of the power supply in electrolysis?

  The power supply drives the flow of electrons through the circuit.
• What is an electrolyte?

  An electrolyte is a liquid or solution containing an ionic compound where ions are free to move.
• What happens when an ion is attracted to an electrode during electrolysis?

  The ion gets discharged and becomes a neutral atom.
• Which metals rely on electrolysis for extraction from their oxides?

  Potassium, sodium, lithium, calcium, magnesium, aluminum, carbon, zinc, iron, tin.
• Why is electrolysis considered more expensive for metal extraction?

  It requires a lot of energy to perform.
• What is a requirement for electrolysis to work effectively?

  The ion must be able to move freely in the solution.
• When does reduction with carbon work in electrolysis?

  It only works with metals that are less reactive than carbon.
• What happens to hydrogen during electrolysis if Cu²⁺ is present?

  Hydrogen will not be discharged if Cu²⁺ is present.
• What is the process to purify bauxite into aluminum oxide?

  Bauxite is purified into aluminum oxide by melting Al₂O₃ with cryolite to lower the melting point.
• What happens in aqueous solutions during electrolysis?

  Soluble ionic compounds can be dissolved in water, allowing ions to move freely.
• What occurs if a halide is present during electrolysis?

  The halide will get discharged at the electrode.
• What happens to the hydroxide ion during electrolysis if no halide is present?

  The hydroxide ion gets discharged at the electrode.
• What is the chemical equation for the dissociation of water in aqueous solutions?

  H₂O → H⁺_aq + OH^-_aq
• What are the key components involved in the process of electrolysis?

  • Electrolysis: Splitting substances using electricity
  • Electrodes: Cathode (reduction) and anode (oxidation)
  • Electrolyte: Ionic compound in liquid form
  • Power supply: Drives electron flow
• What are the advantages and disadvantages of using electrolysis for metal extraction?

  Advantages:

  • Effective for reactive metals
  • Produces pure metals

  
  

  Disadvantages:

  • High energy costs
  • Requires movable ions