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Chemical Tests: Cations & Anions – Lesson, Worksheet & Practical

Edexcel IGCSE Chemistry | Unit 2.47–2.48 | Lesson 35

Overview

This lesson introduces the key qualitative tests for identifying cations and anions in solution. Students explore characteristic precipitate colours, confirm the presence of specific metal or non-metal ions, and apply these techniques in a guided classroom practical.

Specification Covered

• 2.47: Describe tests for cations – NH₄⁺ using sodium hydroxide and identifying gas evolved; Cu²⁺, Fe²⁺ and Fe³⁺ using sodium hydroxide
• 2.48: Describe tests for anions – Cl⁻, Br⁻, I⁻ with acidified silver nitrate; SO₄²⁻ with acidified barium chloride; CO₃²⁻ with dilute hydrochloric acid

What’s Included

• Editable PowerPoint Lesson (Theory + Practical + Tasks)
• Student Worksheet
• Step-by-step methods for each ionic test
• Observation tables and guided review questions

Features

• Fully aligned with Edexcel IGCSE Chemistry Unit 2
• Includes visual support for identifying precipitate colours and gases
• Helps students distinguish between halides and common cations
• Supports practical lab skills with clear, student-safe instructions
• Clean and consistent Synapse Science format