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
61–70 of 156
Question 61
3 marks · Easy
Answer and see the solution →The table below shows some ionic compounds. Complete the table by stating whether each compound is soluble or insoluble in water, according to the solubility rules.
Compound Soluble or Insoluble in water Copper(II) chloride Ammonium sulfate Calcium carbonate Question 62
1 mark · Easy
Answer and see the solution →State one method by which you could obtain a pure, dry sample of sodium sulfate from a solution.
Question 63
3 marks · Easy
Answer and see the solution →Use the solubility rules to answer the following questions.
(a)[1 mark]Are all nitrates soluble or insoluble in water?
(b)[1 mark]Give one example of a soluble sulfate.
(c)[1 mark]Name one insoluble chloride.
Question 64
2 marks · Easy
Answer and see the solution →A solution containing 10 g of sodium chloride is left to crystallise. If the maximum solubility of sodium chloride in water at room temperature is 36 g per 100 g of water, calculate whether all the salt will dissolve in 20 g of water.
Question 65
2 marks · Normal
Answer and see the solution →State whether each of the following compounds is soluble or insoluble in water, according to the solubility rules:
(a)Lead(II) sulfate
(b)[1 mark]Potassium carbonate
(b)[1 mark]Question 66
3 marks · Normal
Answer and see the solution →A student is given a sample of calcium hydroxide and is told that calcium hydroxide is only slightly soluble in water. Using the solubility rules, calculate how many of the following compounds are soluble in water:
Compound Sodium nitrate Barium sulfate Potassium carbonate Calcium sulfate Ammonium chloride State the total number of compounds from the table that are soluble in water.
Question 67
1 mark · Normal
Answer and check →Which method is most suitable for preparing a pure, dry sample of potassium nitrate in the laboratory?
- A.Reacting dilute nitric acid with potassium hydroxide and crystallising from solution
- B.Reacting potassium carbonate with dilute hydrochloric acid and filtering the mixture
- C.Mixing potassium nitrate with water and filtering out the excess solid
- D.Reacting potassium nitrate with silver nitrate and collecting the precipitate
Question 68
4 marks · Normal
Answer and see the solution →Iron(II) sulfate can be made by reacting an acid with a suitable base in the laboratory.
(a)Name two reactants you could use to prepare iron(II) sulfate.
(b)[1 mark]Write the balanced chemical equation for this reaction.
(c)[3 marks]Describe the steps you would take to obtain pure iron(II) sulfate crystals from the reaction mixture.
Question 69
4 marks · Normal
Answer and see the solution →A student wants to prepare a pure, dry sample of barium sulfate in the laboratory. Barium sulfate is insoluble in water.
(a)[1 mark]Name two suitable soluble solutions that could be mixed to prepare barium sulfate.
(b)[2 marks]Describe the steps the student should follow to obtain pure, dry barium sulfate from the mixture after the reaction is complete.
(c)[1 mark]Explain why filtration is necessary in this method.
Question 70
3 marks · Normal
Answer and see the solution →Copper(II) sulfate can be made by adding excess copper(II) oxide to dilute sulfuric acid.
(a)[1 mark]Explain why an excess of copper(II) oxide is added during the preparation.
(b)[2 marks]Describe what the student should do after all the acid has reacted, to obtain dry copper(II) sulfate crystals.