A student investigates the reactivity of four metals, M1\text{M}_1M1, M2\text{M}_2M2, M3\text{M}_3M3, and M4\text{M}_4M4. The student adds a fixed mass of each metal in powdered form to separate polystyrene cups containing excess dilute hydrochloric acid. The initial temperature of the acid in each cup is 20.0∘C20.0^\circ\text{C}20.0∘C.
The table below shows the maximum temperature reached and the observations recorded during each reaction.
| Metal | Maximum temperature reached (∘C^\circ\text{C}∘C) | Observations |
|---|---|---|
| M1\text{M}_1M1 | 20.0 | No visible reaction; metal powder remains unchanged |
| M2\text{M}_2M2 | 42.5 | Vigorous effervescence; all metal dissolves extremely rapidly |
| M3\text{M}_3M3 | 26.1 | Slow effervescence; some metal powder remains after 5 minutes |
| M4\text{M}_4M4 | 34.8 | Steady effervescence; all metal dissolves within 2 minutes |
Use this information to list the four metals in order of reactivity, from most reactive to least reactive.
110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.