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
21–30 of 66 · Easy
Question 21
3 marks · Easy
Answer and see the solution →Potassium carbonate is added to an excess of dilute hydrochloric acid.
(a)[1 mark]Name the salt formed.
(b)[1 mark]Name the gas produced.
(c)[1 mark]Write the chemical formula for all products.
Question 22
2 marks · Easy
Answer and see the solution →Write the balanced ionic equation for the reaction between carbonate ions and hydrogen ions. State the names of all products.
Question 23
1 mark · Easy
Answer and see the solution →Write the word equation that shows what is always formed (other than the salt) when a carbonate reacts with an acid.
Question 24
1 mark · Easy
Answer and see the solution →State whether sodium carbonate is soluble or insoluble in water.
Question 25
3 marks · Easy
Answer and see the solution →A student wants to prepare a pure, dry sample of lead(II) sulfate in the laboratory.
(a)[1 mark]State whether lead(II) sulfate is soluble or insoluble in water.
(b)[1 mark]Name two solutions that could be mixed to produce lead(II) sulfate.
(c)[1 mark]Describe one step the student must take after mixing the solutions to obtain a pure, dry sample of the salt.
Question 26
2 marks · Easy
Answer and see the solution →A solubility rule states that all potassium salts are soluble. Calculate the mass of potassium nitrate (KNO₃) that can dissolve in 100 g of water at room temperature if its solubility is 32 g per 100 g water.
Question 27
2 marks · Easy
Answer and see the solution →Explain why it is not suitable to prepare pure sodium chloride by mixing sodium carbonate with dilute hydrochloric acid and evaporating.
Question 28
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 29
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 30
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.