An environmental chemist is investigating the exothermic displacement reactions of various metals with an aqueous solution of copper(II) sulfate to establish their positions in the reactivity series.
The table below shows the temperature rise, in ∘C^{\circ}\text{C}∘C, recorded over four replicate runs for each metal.
| Metal | Temperature rise in ∘C^{\circ}\text{C}∘C (Run 1) | Temperature rise in ∘C^{\circ}\text{C}∘C (Run 2) | Temperature rise in ∘C^{\circ}\text{C}∘C (Run 3) | Temperature rise in ∘C^{\circ}\text{C}∘C (Run 4) | Mean temperature rise in ∘C^{\circ}\text{C}∘C |
|---|---|---|---|---|---|
| Zinc | 28 | 26 | 29 | 25 | 27 |
| Magnesium | 56 | 53 | 12 | 59 | XXX |
| Tin | 6 | 4 | 5 | 5 | 5 |
Calculate the mean temperature rise XXX for magnesium in the table.
Do not include the anomalous result in your calculation.
Practise AQA GCSE Chemistry Reactivity of metals with exam-style questions for Foundation and Higher tier. 11 questions covering Metal oxides, The reactivity series, Extraction of metals and reduction, and Oxidation and reduction in terms of electrons (HT only), matched to the AQA GCSE Chemistry (8462) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.