A carton is labelled 'pure orange juice'. On this label, 'pure' means that no ingredients have been added.
Chemical analysis detects water, sugars, acids and flavour compounds in the juice.
Use the analysis to state whether the orange juice is a single substance or a mixture.
A manufacturer makes a surface-cleaning liquid for use in hospitals.
| Method 1 | Method 2 |
|---|---|
| The same measured mass of each component is used for every 100 kg batch. | The amounts of the components are adjusted by eye and may differ between batches. |
State which method should be used to make the cleaning liquid as a formulation.
Explain why changing the amounts of the components in Method 2 could make the cleaning liquid less suitable for its job.
113 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.