Lesson Plan

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Lesson Plan
Grade: Date: 18/01/2026
Subject: Chemistry
Lesson Topic: State that metal objects are electroplated to improve their appearance and resistance to corrosion
Learning Objective/s:
  • Describe the principle of electroplating and the role of the electrolytic cell.
  • Explain how electroplating improves appearance and corrosion resistance of metal objects.
  • Identify common metals used for plating and their typical applications.
  • Predict the outcome of a simple copper‑plating experiment on an iron nail.
  • Evaluate safety considerations when performing electroplating in the lab.
Materials Needed:
  • DC power supply (≈2 V)
  • Copper sulfate solution (CuSO₄) and distilled water
  • Copper anode and iron nail (cathode)
  • Beakers, connecting wires, and alligator clips
  • Safety goggles and lab coat
  • Whiteboard or projector for diagram
  • Worksheet with guided questions
 Introduction:
Begin with a quick demonstration: a dull iron nail emerges shiny after a brief electric current is applied. Ask students what might cause this change and link it to prior knowledge of oxidation‑reduction reactions. Explain that today they will explore how electroplating uses electricity to coat objects, and they will be able to describe the process and its benefits.
Lesson Structure:
  1. Do‑now (5') – Students answer: “Why might a jewellery maker want to coat a piece of metal?” and share ideas.
  2. Mini‑lecture (10') – Explain electrolysis, components of an electrolytic cell, and define electroplating using a diagram.
  3. Guided walkthrough (12') – Step‑by‑step explanation of copper plating an iron nail; students complete worksheet.
  4. Hands‑on demonstration (15') – Teacher sets up the copper‑plating apparatus; students observe and record observations.
  5. Think‑pair‑share (5') – Discuss how different plating metals affect appearance and corrosion resistance.
  6. Quick check (3') – Exit ticket: write one benefit of electroplating and one safety precaution.
Conclusion:
Summarise that electroplating deposits a thin metal layer to enhance appearance and protect against corrosion. Students submit an exit ticket stating the key benefit and a safety tip. For homework, they research another metal used in plating and prepare a short paragraph on its industrial use.