Key Concept: More reactive metals displace less reactive metals from their compounds and react more readily with water and acids.
Section A: Using Reaction Evidence
1. A metal A reacts with cold water, metal B reacts only with dilute acid, and metal C does not react with dilute acid. Rank A, B and C in order of reactivity. [2]
2. Put these metals in order of decreasing reactivity: K, Na, Mg, Fe, Cu, Ag. [2]
3. Will zinc displace copper from copper sulfate solution? Explain briefly. [2]
Section B: Equations and Predictions
4. Write the balanced equation for magnesium reacting with dilute hydrochloric acid. [2]
5. Predict whether iron will displace silver from silver nitrate solution. [1]
6. Explain how displacement reactions are used to order metals in the reactivity series. [2]
Total marks: 11
Mark Scheme
1. A most reactive, B middle, C least reactive [2]
2. K, Na, Mg, Fe, Cu, Ag [2]
3. Yes; zinc is more reactive than copper so it displaces it [2]
4. Mg + 2HCl -> MgCl2 + H2 [2]
5. Yes; iron is more reactive than silver [1]
6. A more reactive metal displaces a less reactive metal from its salt; compare outcomes to rank reactivity [2]