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
741–750 of 869
Question 741
2 marks · Hard
Answer and see the solution →Explain why methyl orange is a suitable indicator for titrations involving sodium hydroxide and hydrochloric acid. In your answer, mention what the colour change shows about the reaction mixture.
Question 742
5 marks · Hard
Answer and see the solution →A student is asked to prepare pure ammonium sulfate crystals using ammonia solution and dilute sulfuric acid in the laboratory.
(a)[2 marks]Explain why the titration method must be used instead of the excess solid method for this preparation.
(b)[2 marks]State two practical reasons why an indicator is not added to the acid and alkali mixture when making the final batch of ammonium sulfate for crystallisation.
(c)[1 mark]Describe what the student should do after mixing the correct volumes of acid and alkali, to obtain pure, dry crystals of ammonium sulfate.
Question 743
2 marks · Hard
Answer and see the solution →Give two steps the student must follow to make pure potassium chloride crystals using titration and crystallisation with potassium hydroxide and hydrochloric acid.
Question 744
1 mark · Easy
Answer and see the solution →State the name of the insoluble salt formed when solutions of barium nitrate and potassium sulfate are mixed.
Question 745
3 marks · Easy
Answer and see the solution →A student wants to prepare a sample of insoluble silver iodide by mixing solutions of two soluble salts.
(a)[2 marks]Name a suitable silver salt solution and a suitable iodide salt solution the student could use.
(b)[1 mark]State the colour of the precipitate formed.
Question 746
2 marks · Easy
Answer and see the solution →Write a balanced ionic equation, including state symbols, for the formation of calcium carbonate as a precipitate from aqueous solutions.
Question 747
2 marks · Easy
Answer and see the solution →In the reaction between zinc nitrate solution and sodium carbonate solution, a precipitate forms.
Explain which ions are the spectator ions in this reaction.
Question 748
3 marks · Easy
Answer and see the solution →A student mixes different pairs of solutions and records whether a precipitate forms. The results are shown in the table below.
Solution 1 Solution 2 Observation Magnesium sulfate Sodium carbonate White precipitate Potassium chloride Sodium nitrate No precipitate Calcium nitrate Sodium sulfate White precipitate Use the table to answer the questions.
(a)[1 mark]Which pair of solutions does NOT produce an insoluble salt?
(b)[1 mark]Name one insoluble salt formed in these reactions.
(c)[1 mark]Give a reason why no precipitate forms when potassium chloride and sodium nitrate are mixed.
Question 749
1 mark · Easy
Answer and see the solution →Complete the ionic equation for the formation of silver chloride: Ag^+(aq) + ___(aq) → AgCl(s)
Question 750
3 marks · Easy
Answer and see the solution →The following reaction occurs when lead(II) nitrate and sodium sulfate solutions are mixed:
(a)[1 mark]Name the precipitate formed.
(b)[2 marks]Identify all the spectator ions in this reaction.