A student records these results in two displacement tests.
| Test | Result |
|---|---|
| Magnesium added to iron(II) sulfate solution | Iron is displaced |
| Iron added to silver nitrate solution | Silver is displaced |
A second student predicts that magnesium will displace silver from silver nitrate solution and writes this ionic equation:
Mg+Ag+→Mg2++Ag\mathrm{Mg + Ag^{+} \rightarrow Mg^{2+} + Ag}Mg+Ag+→Mg2++Ag
Evaluate the second student's prediction and equation. Justify your evaluation using electron transfer.
113 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.