Electrolysis: Foundations to Industrial Application

Level: University Level (Ages 18–22)

Learn Electrolysis: Foundations to Industrial Application at University Level (Ages 18–22) level. Adaptive step-by-step learning pathway with interactive lessons and mastery quizzes on Akwụkwọ.

Course Modules & Syllabus

  1. Module 1: Module 1: Redox Foundations and Electrochemical Cells

    • Define oxidation and reduction in terms of electron transfer; identify oxidation states and predict redox pairs in aqueous solutions
    • Distinguish between galvanic (spontaneous) and electrolytic (non-spontaneous) cells; explain the role of electrodes (anode, cathode) and electrolytes
    • Apply the concept of cell potential (E°) to predict spontaneity; relate Gibbs free energy to electrochemical work

  2. Module 2: Module 2: Electrolyte Solutions and Electrode Reactions

    • Explain ionic dissociation in aqueous solutions; predict which ions migrate to anode and cathode based on charge and electronegativity
    • Write half-reactions at electrodes; identify discharge potentials and predict which species oxidise or reduce first (e.g., in seawater or brine solutions)
    • Apply the concept of overpotential to explain why theoretical and observed potentials differ in practical electrolysis

  3. Module 3: Module 3: Faraday's Laws and Quantitative Electrolysis

    • State Faraday's First and Second Laws; calculate moles of product from charge (coulombs) and current–time data
    • Solve problems involving mass of substance deposited or liberated; relate Faraday constant (F = 96,485 C/mol) to molar quantities
    • Determine current efficiency and energy consumption in electrolytic processes; apply stoichiometry to multi-electron transfers

  4. Module 4: Module 4: Electrolysis of Water and Aqueous Solutions

    • Write balanced equations for water electrolysis (acidic and alkaline conditions); explain why hydrogen and oxygen evolve at specific electrodes
    • Predict products of electrolysing common salt solutions (NaCl, CuSO₄, AgNO₃); explain competing reactions and selectivity
    • Calculate theoretical cell voltage and energy requirements; compare with practical values accounting for overpotential and resistance

  5. Module 5: Module 5: Industrial Electrolysis—Copper Refining and Chlor-Alkali

    • Describe the electrorefining of copper: purification mechanism, anode mud composition, and cathode deposit purity; relate to Nigerian artisanal copper work and recycling
    • Explain the chlor-alkali process: electrolysis of brine, products (Cl₂, NaOH, H₂), and industrial significance; discuss environmental and safety considerations
    • Analyse energy costs, electrode materials, and process efficiency; evaluate trade-offs between purity, yield, and sustainability

  6. Module 6: Module 6: Electroplating and Metal Deposition

    • Design electroplating cells: select electrolyte, anode, cathode, and voltage to achieve desired coating thickness and adhesion
    • Calculate plating time and current from Faraday's laws; predict deposit composition and surface quality
    • Apply electroplating to corrosion prevention and decorative finishing; discuss environmental impact of waste electrolytes

  7. Module 7: Module 7: Electrolysis in Energy and Environmental Contexts

    • Evaluate water electrolysis as a renewable hydrogen source; calculate energy input and compare with fossil fuel alternatives
    • Explain electrochemical remediation: electrokinetic soil treatment and electrochemical water purification; assess feasibility in Nigerian contexts (e.g., contaminated water sources)
    • Analyse thermodynamic and kinetic barriers to electrolytic processes; propose strategies to improve efficiency and reduce environmental footprint

  8. Module 8: Module 8: Problem-Solving and Synthesis—Design and Optimisation

    • Solve multi-step electrolysis problems integrating redox chemistry, Faraday's laws, cell potential, and overpotential; justify assumptions and approximations
    • Design an electrolytic process for a specified product (e.g., purification of a metal ore common in Nigeria, or desalination of brackish water); justify electrode choice, electrolyte, and operating conditions
    • Critically evaluate trade-offs between theoretical yield, practical efficiency, cost, and environmental impact; communicate findings with quantitative support