A student repeated an experiment five times to measure the highest temperature reached during the displacement reaction between magnesium powder and copper(II) sulfate solution.
The table below shows the results of the five trials:
| Trial | Highest temperature reached (∘C^\circ\text{C}∘C) |
|---|---|
| 1 | 41.8 |
| 2 | 41.3 |
| 3 | 42.1 |
| 4 | 41.6 |
| 5 | 41.7 |
Calculate the mean highest temperature reached and its associated uncertainty.
State your final answer in the form: mean±uncertainty\text{mean} \pm \text{uncertainty}mean±uncertainty.
53 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.