Summary

• Description:

  The PDF document comprises Form 2 Chemistry Effect of an Electric Current on Substances Notes.

  The topics and sub-topics covered in the document are listed below:

  • Introduction to Electrochemistry
    • Definition of key terms: electric current, conductor, and non-conductor.
    • The fundamental concept of electrochemistry as the study of how chemical reactions produce electricity and vice-versa.
  • Electrical Conductivity of Substances
    • Conductivity in Solids: Explains why metals and graphite are good conductors due to the presence of delocalized electrons, while other solids are non-conductors.
    • Conductivity in Molten Substances: Discusses how ionic compounds like lead (II) bromide conduct electricity when molten due to mobile ions, whereas molecular substances like sugar do not.
    • Conductivity in Aqueous State: Covers how solutions of acids, bases, and salts conduct electricity because they contain mobile ions.
  • Electrolysis
    • Definition of electrolysis, electrolyte, non-electrolyte, and electrodes (anode and cathode).
    • Explanation of the electrolysis process, including the movement of cations to the cathode and anions to the anode.
    • Electrolysis of Binary Electrolytes:
      • A detailed breakdown of the electrolysis of molten lead (II) bromide, including the apparatus setup, observations, and the specific reactions occurring at the anode and cathode.
      • A summary table showing the products of electrolysis for other binary compounds like lead (II) iodide, sodium chloride, and aluminum oxide.
  • Applications of Electrolysis
    • Extraction of reactive metals.
    • Purification of metals.
    • Electroplating of metals.
    • Manufacture of pure chemicals like chlorine and sodium hydroxide.
  • Checkpoint (Review Exercises)
    • A set of practice questions to test the understanding of concepts covered in the topic.

  These notes on the Effect of an Electric Current on Substances are well-organized, neat, and printable. They clearly explain the principles of conductivity and electrolysis with the help of simple, labeled diagrams and detailed experimental procedures. The inclusion of summary tables and review questions makes these notes a comprehensive and excellent resource for Form 2 students, teachers preparing lessons, and candidates revising for their KCSE examinations.

• File Size:

  699.56 KB
• Length:

  8 pages
• Category:

  Lesson Notes
• Level:

  Form 2
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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