Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
691–700 of 869
Question 691
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 692
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 693
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 694
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 695
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 696
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 697
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 698
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 699
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 700
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.