Teacher and technician pack · GCSE Chemistry
Water purification: teacher and technician pack
GCSE Chemistry required practical 8
Plan, prepare and teach the water purification practical: technician sheet, risk assessment, timed lesson plan, expected results, questions and mark schemes.
What is inside
- Technician sheet: apparatus per group, reagents and preparation
- Risk assessment
- Lesson plan in nine timed steps
- Method and the model’s expected ranges
- Exam questions with full mark schemes
- Common mistakes and misconceptions
- Using the virtual practical
- Sign-off box for the department
The practical: Analyse water from four sources (pH and dissolved solids), then purify sea water by distillation and test the sea water and the distilled water for sodium and chloride ions.
The pack a busy department needs before the lesson: an apparatus list per group with what to check, reagents and their preparation, a risk assessment, and a lesson plan in nine timed steps from planning to evaluation. The expected-results section gives the ranges the model predicts for a careful group, labelled as the model’s, not as a promise.
Exam questions come with full mark schemes, followed by the common mistakes and what students say when they make them.