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
111–120 of 136 · Hard
Question 111
5 marks · Hard
Answer and see the solution →A student adds an excess of dilute nitric acid to a sample of iron(II) carbonate in a beaker.
(a)[2 marks]Write the balanced chemical equation for this reaction.
(b)[1 mark]Name the salt formed in this reaction.
(c)[2 marks]Write the total ionic equation for this reaction, omitting spectator ions.
Question 112
2 marks · Hard
Answer and see the solution →A student adds sodium carbonate to an excess of dilute hydrochloric acid. Bubbles are seen. Name the two non-salt products formed in this reaction.
Question 113
2 marks · Hard
Answer and see the solution →State two exceptions to the general solubility of chlorides in water. For each exception, name the insoluble chloride.
Question 114
5 marks · Hard
Answer and see the solution →You are asked to prepare a pure, dry sample of magnesium sulfate in the laboratory using insoluble magnesium carbonate and dilute sulfuric acid.
(a)[2 marks]Explain why magnesium carbonate and sulfuric acid can be used to prepare magnesium sulfate by this method.
(b)[3 marks]Describe the steps you would take to obtain a pure, dry sample of magnesium sulfate from these reactants.
Question 115
2 marks · Hard
Answer and see the solution →State the general solubility rules for carbonates and hydroxides of common metals in water.
Question 116
2 marks · Hard
Answer and see the solution →When making hydrated zinc sulfate crystals from zinc oxide and sulfuric acid, the final solution is left to cool so that crystals form. Explain, in two points, why crystallisation is used instead of evaporation to dryness to obtain hydrated salt crystals.
Question 117
5 marks · Hard
Answer and see the solution →A student prepares hydrated magnesium sulfate crystals by reacting magnesium carbonate with dilute sulfuric acid.
(a)[2 marks]Write the balanced symbol equation for the reaction between magnesium carbonate and dilute sulfuric acid.
(b)[1 mark]State the state symbols for each product.
(c)[2 marks]During the process, the solution is concentrated and then left to crystallise. Write the equation for the crystallisation step, including water of crystallisation.
Question 118
2 marks · Hard
Answer and see the solution →Describe two steps a student must carry out to obtain pure hydrated copper(II) sulfate crystals from a mixture of copper(II) oxide and dilute sulfuric acid, once the reaction has finished.
Question 119
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 120
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.