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Atmospheric Gases & Reactions with Oxygen – Lesson & Worksheet

Edexcel IGCSE Chemistry | Unit 2.9–2.11, 2.14 | Lesson 23

Overview

A structured and visually clear lesson that introduces students to the composition of air and the reactions of oxygen with metals and non-metals. Includes worked examples, theory explanations, and exam-style tasks. The lesson also covers required practical techniques for calculating oxygen percentage in air using combustion reactions.

Specification Covered

• 2.9: Know the approximate percentages by volume of gases in dry air
• 2.10: Determine oxygen volume via metal/non-metal reactions
• 2.11: Describe combustion of magnesium, hydrogen, and sulfur
• 2.14: Practical – determining % oxygen in air (triple only)

What’s Included

• Editable PowerPoint Lesson (Theory + Practical + Tasks)
• Student Worksheet
• Worked examples and balanced equations
• Practical diagram and explanation of oxygen-volume demo

Features

• Fully aligned with Edexcel IGCSE Chemistry Unit 2
• Clear visuals and scaffolding for understanding experimental setup
• Covers both theoretical understanding and practical skills
• Useful for both single and triple science students
• Consistent Synapse Science formatting for ease of classroom use