Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Chemistry
Lesson Topic: State the sources of the sulfur dioxide (burning sulfur or roasting sulfide ores) and oxygen (air) in the Contact process
Learning Objective/s:
  • Describe the chemical reactions that generate SO₂ from elemental sulfur and from roasting sulfide ores.
  • Identify air as the source of O₂ used in the Contact process.
  • Explain why these sources are suitable for large‑scale production of sulphuric acid.
  • Compare the two methods of obtaining SO₂ in terms of raw‑material availability and environmental impact.
Materials Needed:
  • Projector and screen
  • PowerPoint slides with equations and diagrams
  • Printed handout containing the source table
  • Flow‑diagram of the Contact process (large poster or digital)
  • Worksheet for pair activity
  • Exit‑ticket slips
 Introduction:
Begin with a quick question: “What everyday products rely on sulphuric acid?” Connect this to students’ prior knowledge of equilibrium in industrial reactions. State that by the end of the lesson they will be able to list and explain the raw‑material sources of SO₂ and O₂ in the Contact process.
Lesson Structure:
  1. Do‑now (5’) – 5‑question quiz on reversible reactions and dynamic equilibrium.
  2. Mini‑lecture (10’) – Present the two SO₂ sources (burning S and roasting sulfide ores) and the O₂ source (air) with balanced equations using slides.
  3. Guided pair activity (10’) – Students complete a table matching each source to its reaction and note industrial advantages.
  4. Whole‑class discussion (5’) – Compare burning sulfur vs. ore roasting; discuss availability and environmental considerations.
  5. Diagram labeling (10’) – Using the flow diagram, learners label where SO₂ and O₂ enter the Contact process.
  6. Check for understanding (5’) – Exit ticket: write one source for SO₂ and one for O₂ and a brief reason why they are used.
Conclusion:
Recap the key sources of SO₂ and O₂ and their relevance to sulphuric‑acid production. Collect exit tickets to gauge understanding, and assign a short homework: research one environmental impact of sulphide‑ore roasting and suggest a mitigation strategy.