Summary

• Description:

  The PDF document comprises Form 4 Chemistry Electrochemistry Notes.

  The topics and sub-topics covered in the document include:

  • Reduction and Oxidation (REDOX)
    • Definitions based on oxygen transfer, hydrogen transfer, electron transfer, and oxidation numbers.
    • Rules for assigning oxidation numbers and their application in identifying oxidizing and reducing agents.
    • Analysis of redox reactions through displacement reactions and various chemical equations.
  • Electrochemical (Voltaic) Cells
    • Construction and operation of electrochemical cells, including the role of half-cells and the salt bridge.
    • Standard Electrode Potential (E⁰), the standard hydrogen electrode, and the electrochemical series.
    • Calculation of the electromotive force (e.m.f) of a cell and predicting the feasibility of reactions.
    • Practical examples like the Zinc-Copper cell.
    • Commercial applications, including the Leclanché (dry) cell and the Lead-acid (wet/accumulator) battery.
  • Electrolysis (Electrolytic Cell)
    • Definitions of electrolysis, electrolytes (strong and weak), and non-electrolytes.
    • The setup of an electrolytic cell with anodes, cathodes, and inert electrodes.
    • Factors influencing the products of electrolysis:
      • Position of ions in the electrochemical series (selective discharge).
      • Concentration of the electrolyte (e.g., electrolysis of dilute vs. concentrated brine).
      • Nature of the electrodes (inert vs. active/participating electrodes).
    • Industrial applications: extraction of reactive metals, purification of copper, and electroplating.
  • Faraday's Laws of Electrolysis
    • Faraday's First Law of electrolysis.
    • Quantitative aspects of electrolysis, relating charge (Coulombs), current (Amperes), and time.
    • The Faraday constant (F) and its use in calculations.
    • Numerous worked examples and practice problems for calculating the mass or volume of substances produced during electrolysis.

  These notes are comprehensive, neat, and printable, making them an excellent resource for students preparing for their KCSE examinations. They are also highly suitable for teachers to use in lesson preparation, with detailed explanations, clear diagrams, and a wide variety of calculation examples to reinforce understanding.

• File Size:

  858.40 KB
• Length:

  47 pages
• Category:

  Lesson Notes
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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