A laboratory makes a crop-protection compound in four batches. The required minimum percentage yield is 72%.
| Batch | Actual yield / g | Theoretical yield / g |
|---|---|---|
| Fern | 12 | 20 |
| Moss | 18 | 24 |
| Reed | 21 | 30 |
| Sage | 17 | 25 |
Which batch meets the required minimum percentage yield?
Fern
Sage
Reed
Moss
151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.