Industrial liquid waste sometimes contains dissolved precious metals. Scrap copper can be used to recover silver metal from a solution containing silver ions.
Cu(s)+2Ag+(aq)→Cu2+(aq)+2Ag(s) \text{Cu}(\text{s}) + 2\text{Ag}^{+}(\text{aq}) \rightarrow \text{Cu}^{2+}(\text{aq}) + 2\text{Ag}(\text{s}) Cu(s)+2Ag+(aq)→Cu2+(aq)+2Ag(s)Explain why this displacement reaction is described as a redox reaction. You should refer to electrons in your answer.
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.