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Percentage of Oxygen in Air - Required Practical 2.14

This resource provides a structured, student-friendly worksheet for Required Practical 2.14: Determine the approximate percentage by volume of oxygen in air using a metal or non-metal. It is fully aligned with the Edexcel IGCSE Chemistry specification and helps students understand how volume changes during oxidation can be used to calculate gas composition.

Designed to support Paper 1 required practical content and the development of core laboratory skills, this resource walks students through either the iron wool or phosphorus method with clarity and care.

Paper 1 Specification Covered

• 2.14: Determine the approximate percentage by volume of oxygen in air using a metal or a non-metal

Features

• Curriculum Aligned: Specification clearly included on the worksheet
• Practical Flow: Background → Aim → Apparatus → Method → Results Table → Conclusion → Teacher Notes
• Dual Method Included: Iron wool (student-led) and phosphorus (teacher demo) versions
• Student-Focused Layout: Space provided for observations, analysis, and conclusion writing
• Model Answer Provided: Example conclusion included in Teacher Notes
• MSDS Summary: Safety notes for iron wool and white phosphorus
• Assessment Support: Integrated 3-level practical rubric (Developing → Securing → Exceeding)
• Flexible Use: Designed for a single lesson, suitable for revision and exam prep
• Cohesive Design: Consistent Synapse Science format matches other Chemistry practicals

What’s Included

• 1 x Required Practical 2.14 Student Worksheet
• 1 x Teacher and Technician Notes section (included on the sheet)

Keywords

Edexcel IGCSE Chemistry, Required Practical, Air Composition, Oxygen, Iron Wool, Phosphorus, Gas Volume, Practical Worksheet, Synapse Science, Paper 1, Practical Skills, Teacher Notes