The ionic equation for the displacement reaction between magnesium and copper(II) sulfate solution is shown below:
Mg (s)+Cu2+(aq)→Mg2+(aq)+Cu (s) \text{Mg (s)} + \text{Cu}^{2+}\text{(aq)} \rightarrow \text{Mg}^{2+}\text{(aq)} + \text{Cu (s)} Mg (s)+Cu2+(aq)→Mg2+(aq)+Cu (s)This reaction is described as a redox reaction.
Explain, in terms of electrons, which species have been oxidised and which species have been reduced in this reaction.
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.