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
121–130 of 156
Question 121
2 marks · Normal
Answer and see the solution →Describe how you would make an insoluble salt of calcium sulfate, starting from solutions of calcium nitrate and sodium sulfate.
Question 122
4 marks · Normal
Answer and see the solution →The insoluble salt lead(II) iodide can be made by a precipitation reaction involving lead(II) nitrate and potassium iodide.
(a)[2 marks]Write a balanced chemical equation, with state symbols, for this reaction.
(b)[2 marks]Write an ionic equation, with state symbols, for the formation of lead(II) iodide in this reaction.
Question 123
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 124
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 125
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 126
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 127
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 128
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 129
2 marks · Hard
Answer and see the solution →Write the balanced ionic equation, including state symbols, for the formation of lead(II) sulfate as a precipitate from aqueous solutions.
Question 130
5 marks · Hard
Answer and see the solution →Copper(II) carbonate is an insoluble salt produced by a precipitation reaction between aqueous copper(II) sulfate and sodium carbonate.
(a)[2 marks]Write the full balanced chemical equation, including state symbols, for this reaction.
(b)[1 mark]State the formula of the spectator ions in this reaction.
(c)[2 marks]Explain why these ions are considered spectator ions.