Chemical analysis Purity and Formulations C8

This ready-to-use lesson introduces students to the concept of pure substances vs mixtures, boiling/melting points, and formulations — fully aligned to the AQA GCSE Combined Science specification (C8 – Chemical Analysis).

What’s included

Engaging lesson with clear explanations and diagrams
Retrieval starter to activate prior knowledge
Step-by-step teacher notes with suggested questions and misconceptions to address
Check for Understanding activities (whiteboards, multiple choice, discussion tasks)

Exam-style practice question with mark scheme
Stretch & challenge tasks to extend higher-attaining students

Learning Objectives

LO 1 : Define a pure substance in scientific terms and explain how this differs from everyday language.

LO 2: Interpret melting and boiling point data to identify whether a substance is pure or a mixture.

LO 3: Describe formulations as useful mixtures, giving examples of how components are carefully combined for specific purposes.

Why this lesson works

Curriculum aligned – AQA Combined Science C8, suitable for KS4 Chemistry or Foundation GCSE Science.

Ofsted-ready pedagogy – retrieval practice, modelling with visualiser, scaffolding & adaptive teaching.

Engaging resources – simple, clean graphics and logos for substances and formulations, making abstract concepts visual and memorable.

Assessment built-in – worksheets and exam questions with mark schemes included.