| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Chemistry |
| Lesson Topic: Describe the general chemical properties of metals, limited to their reactions with: (a) dilute acids (b) cold water and steam (c) oxygen |
Learning Objective/s:
- Describe the general chemical properties of metals when they react with dilute acids, cold water/steam, and oxygen.
- Explain the electron‑transfer process that underlies these reactions and predict the products formed.
- Compare reactivity trends among common metals using a reactivity series.
- Interpret experimental observations such as hydrogen evolution, flame colour, and rust formation.
- Apply the concepts to classify metals as highly, moderately, or low reactive.
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Materials Needed:
- Projector and screen for slides/diagrams
- Whiteboard and markers
- Printed handout with reaction tables and summary
- Sample metal specimens (zinc, magnesium, iron) and safety goggles
- Dilute hydrochloric acid, water, and a Bunsen burner for steam
- Observation worksheet for students
- Exit‑ticket slips for the final check
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Introduction:
Begin with a quick demonstration of hydrogen gas bubbling when zinc is added to dilute HCl to spark curiosity. Review students’ prior knowledge of electron loss and cation formation. Explain that by the end of the lesson they will be able to predict how metals behave with acids, water/steam, and oxygen.
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Lesson Structure:
- Do‑now (5') – short quiz on metal ions and electron loss.
- Mini‑lecture (10') – overview of metal reactivity, key equations for acid, water/steam, and oxygen reactions.
- Demonstration (15') – zinc + HCl, magnesium + steam, iron rusting; students record observations on worksheets.
- Guided practice (10') – complete a comparison table for Na, Mg, Fe, Cu using the handout.
- Think‑pair‑share (5') – discuss why copper does not react noticeably with dilute acids.
- Formative check (5') – Kahoot quiz on predicting products of given metal reactions.
- Summary & reflection (5') – teacher recaps trends and students share one new insight.
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Conclusion:
Summarise the three reaction types and the reactivity hierarchy observed. Collect exit tickets asking students to name one metal that reacts only with steam and one that does not react with dilute acid. Assign homework: complete a worksheet classifying additional metals based on their reactivity with the three reagents.
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