A student prepares a pure, dry sample of potassium nitrate crystals. The theoretical yield is calculated from the limiting reactant.
| Measurement | Mass / g |
|---|---|
| empty weighing bottle | 18.42 |
| weighing bottle and dry crystals | 24.09 |
| theoretical yield of crystals | 8.10 |
Calculate the percentage yield.
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.