A manufacturer produces a concentrated cleaning liquid from two components.
| Component | Purpose | Percentage by mass in the standard recipe | Mass in one 500 g batch |
|---|---|---|---|
| P | loosens dirt | 70% | 360 g |
| Q | allows the cleaner to spread evenly | 30% | 140 g |
Evaluate the claims that the cleaning liquid is a formulation and that the 500 g batch follows the standard recipe. Use calculations in your answer.
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.