Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Displacement reactions involving solutions of salts
19 practice questions
Practice questions
11–19 of 19
Question 11
3 marks · Normal
Answer and see the solution →Silver is displaced from a solution of silver nitrate by magnesium metal. Write balanced ionic half-equations for the oxidation and reduction steps in this reaction.
Question 12
3 marks · Normal
Answer and see the solution →In the reaction below, explain which substance is the oxidising agent and which is the reducing agent. Give your reasoning in terms of electron transfer.
Question 13
4 marks · Normal
Answer and see the solution →The table below shows observations from adding different metals to solutions of salts.
Observations of displacement reactions Metal added Solution Observation Zinc Copper(II) sulfate Brown solid forms; blue solution fades Copper Silver nitrate Grey crystals form; colourless solution turns blue Iron Magnesium sulfate No visible change For each reaction in the table, write the full ionic equation showing the species that change during the reaction. Where no reaction occurs, state why.
Question 14
1 mark · Normal
Answer and check →Which of the following is a spectator ion in the reaction between zinc and copper(II) chloride solution?
- A.Zn^{2+}
- B.Cl^-
- C.Cu^{2+}
- D.Zn(s)
Question 15
2 marks · Normal
Answer and see the solution →Write the ionic half-equation for the reduction that takes place when lead metal is formed from lead(II) ions.
Question 16
4 marks · Normal
Answer and see the solution →When manganese metal is placed in a solution of iron(II) sulfate, a displacement reaction occurs.
(a)[1 mark]State the oxidising agent in this reaction.
(b)[1 mark]State the reducing agent in this reaction.
(c)[2 marks]Explain why manganese is the reducing agent in terms of electron transfer.
Question 17
2 marks · Hard
Answer and see the solution →When iron metal is placed in a solution of copper(II) sulfate, a reaction occurs in which copper metal forms. Write the balanced ionic equation for this displacement reaction.
Question 18
5 marks · Hard
Answer and see the solution →A piece of magnesium is placed in a solution of nickel(II) chloride. Magnesium displaces nickel from the solution.
(a)[1 mark]Identify the spectator ion present in this reaction.
(b)[2 marks]Explain what is meant by a spectator ion in a displacement reaction.
(c)[1 mark]State, in terms of electron transfer, which ion acts as the oxidising agent in this reaction.
(d)[1 mark]State, with a reason, which atom or ion acts as the reducing agent.
Question 19
2 marks · Hard
Answer and see the solution →When zinc metal reacts with iron(II) sulfate solution, write the ionic half-equation for the reduction step in this displacement reaction.