A student places a strip of magnesium in iron(II) sulfate solution. A grey coating forms on the magnesium. When a strip of iron is placed in magnesium sulfate solution, there is no visible change.
Explain which metal forms positive ions more readily, magnesium or iron.
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.