Magnesium powder is added to copper sulfate solution. Copper is displaced.
Which option gives the ionic equation for the reaction and a correct statement about it?
Mg+Cu2+→Mg2++Cu\mathrm{Mg + Cu^{2+} \rightarrow Mg^{2+} + Cu}Mg+Cu2+→Mg2++Cu and copper ions are oxidised
Mg2++Cu→Mg+Cu2+\mathrm{Mg^{2+} + Cu \rightarrow Mg + Cu^{2+}}Mg2++Cu→Mg+Cu2+ and magnesium ions are reduced
Mg+CuSO4→MgSO4+Cu\mathrm{Mg + CuSO_{4} \rightarrow MgSO_{4} + Cu}Mg+CuSO4→MgSO4+Cu and magnesium atoms gain electrons
Mg+Cu2+→Mg2++Cu\mathrm{Mg + Cu^{2+} \rightarrow Mg^{2+} + Cu}Mg+Cu2+→Mg2++Cu and magnesium atoms are oxidised
60 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.