Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Acids, Bases and Salt Preparations
156 practice questions
Topics covered
- Reactions of acids18 practice questions
- Reacting acids with bases19 practice questions
- Reacting acids with carbonates19 practice questions
- Salt preparations19 practice questions
- Making soluble salts (except sodium, potassium and ammonium salts)19 practice questions
- Making sodium, potassium and ammonium salts18 practice questions
- Making insoluble salts19 practice questions
- Theories of acids and bases19 practice questions
Practice questions
51–60 of 66 · Normal
Question 51
3 marks · Normal
Answer and see the solution →A precipitation reaction is carried out by mixing 50 cm^3 of 0.1 mol/dm^3 barium nitrate solution with excess potassium sulfate solution. The reaction forms barium sulfate as a precipitate according to the equation:
State the formula of the precipitate and name one spectator ion in the reaction.
Question 52
3 marks · Normal
Answer and see the solution →Explain why mixing solutions of barium chloride and sodium sulfate produces a white precipitate, but mixing barium chloride and sodium chloride does not.
Question 53
4 marks · Normal
Answer and see the solution →Three precipitation reactions are shown below. For each reaction, complete the table by writing a balanced ionic equation for the formation of the insoluble salt, including state symbols.
Precipitation Reactions Reaction Insoluble Salt Ionic Equation Silver nitrate + sodium bromide Silver bromide Lead(II) nitrate + potassium sulfate Lead(II) sulfate Barium chloride + sodium carbonate Barium carbonate Question 54
1 mark · Normal
Answer and check →Which of the following ions is a spectator ion in the reaction between barium nitrate and sodium sulfate?
- A.Ba^{2+}
- B.SO_4^{2-}
- C.Na^+
- D.BaSO_4
Question 55
2 marks · Normal
Answer and see the solution →State the names of two solutions you could mix to make an insoluble salt of silver bromide.
Question 56
4 marks · Normal
Answer and see the solution →Copper(II) sulfate is an insoluble salt that can be made by a precipitation reaction. It is required for an experiment.
(a)[2 marks]Write a balanced chemical equation, with state symbols, for the reaction between copper(II) nitrate solution and sodium sulfate solution to form copper(II) sulfate.
(b)[2 marks]Write the ionic equation, with state symbols, for the formation of copper(II) sulfate in this reaction.
Question 57
2 marks · Normal
Answer and see the solution →State two differences between the Arrhenius and Bronsted-Lowry theories of acids and bases.
Question 58
4 marks · Normal
Answer and see the solution →Hydrogen chloride (HCl) and ammonia (NH_3) both undergo acidbase reactions according to the Bronsted-Lowry theory.
(a)[1 mark]Write a balanced equation (with state symbols) for the reaction between aqueous ammonia and hydrochloric acid.
(b)[1 mark]Identify which substance acts as the acid and which acts as the base in this reaction, according to the Bronsted-Lowry theory.
(c)[2 marks]Explain your answer to part (b) in terms of proton transfer.
Question 59
3 marks · Normal
Answer and see the solution →In the reaction: \[ HNO_3(aq) + NH_3(aq) \rightarrow NH_4^+(aq) + NO_3^-(aq) \] use the Bronsted-Lowry definition to identify:
(a)[1 mark]The acid and the base on the left side of the equation. (1 mark)
(b)[1 mark]The conjugate acid and conjugate base formed on the right side. (1 mark)
(c)[1 mark]State which species donates the proton and which accepts it. (1 mark)
Question 60
3 marks · Normal
Answer and see the solution →Explain how the hydroxonium ion (H_3O^+) is formed when an acid dissolves in water, and describe its role in acidbase reactions.