Making predictions using the reactivity series
2 marks · NormalPotassium, magnesium, and copper are three metals in the reactivity series.
State which one you would expect to react most vigorously with dilute sulfuric acid. Explain your answer.
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Potassium; because it is higher in the reactivity series so reacts more vigorously with acids.
Also accept: Potassium; it is a Group 1 metal / most reactive of the three
Common mistakes: Choosing magnesium or copper; Failing to explain using reactivity series
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Marking points
B1 · 1 mark · Correctly identifies potassium as the most vigorous.
B2 · 1 mark · Explains using relative positions in reactivity series (e.g. potassium highest, most reactive, so reacts most vigorously).
Worked solution
Potassium will react most vigorously with dilute sulfuric acid because it is higher in the reactivity series than magnesium and copper.