Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Displacement reactions as redox reactions
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →Write the balanced ionic equation, including state symbols, for the reaction that occurs when chlorine gas is bubbled through a solution containing sodium bromide. Do not include spectator ions.
Question 2
5 marks · Hard
Answer and see the solution →Iodine solution is added to potassium chloride solution. No reaction is observed. Consider the redox processes involved in displacement reactions between halogens and halide ions.
(a)[2 marks]Explain, in terms of electron transfer, why iodine does not displace chloride ions from potassium chloride solution.
(b)[2 marks]A reaction does occur when bromine water is added to potassium iodide solution. State which species is oxidised and which is reduced in this reaction.
(c)[1 mark]Write the balanced ionic equation, including state symbols, for the reaction between bromine solution and iodide ions.
Question 3
2 marks · Hard
Answer and see the solution →Complete the ionic equation, including state symbols, for the reaction of fluorine gas with potassium bromide solution.