Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Displacement reactions involving solutions of salts
19 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
2 marks · Normal
Answer and see the solution →Write the ionic equation for the reaction that occurs when a strip of magnesium is placed into a solution of iron(II) sulfate.
Question 2
4 marks · Normal
Answer and see the solution →Aluminium reacts with a solution of copper(II) nitrate.
(a)[1 mark]State the formula of a spectator ion in this reaction.
(b)[1 mark]Explain what is meant by the term 'spectator ion'.
(c)[2 marks]Identify the spectator ion(s) in the following equation:
Question 3
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 4
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 5
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 6
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 7
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 8
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.