An analyst carries out a titration to monitor a solution used in a manufacturing process.
The table shows the analyst's burette readings.
| Titration | Rough | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Initial burette reading (cm3\mathrm{cm^{3}}cm3) | 0.15 | 0.40 | 18.70 | 0.20 | 18.80 |
| Final burette reading (cm3\mathrm{cm^{3}}cm3) | 18.80 | 18.70 | 37.05 | 18.80 | 37.20 |
Calculate the reliable mean titre from the burette readings.
Show your working.
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.