A technician carries out two accurate titrations after completing a preliminary titration.
| Accurate titration | Titre / cm3\mathrm{cm^{3}}cm3 |
|---|---|
| 1 | 27.40 |
| 2 | 27.65 |
Explain why the technician should not calculate a mean from these two titres and what the technician should do next.
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.