Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Salt preparations
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State whether sodium carbonate is soluble or insoluble in water.
Question 2
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 3
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 4
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 5
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 6
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 7
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 8
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 9
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 10
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.