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
781–790 of 869
Question 781
2 marks · Hard
Answer and see the solution →For the reaction below, identify the acid and the base according to the Bronsted-Lowry definition.
Question 782
5 marks · Easy
Answer and see the solution →This question is about the reactions of acids with different substances.
(a)[1 mark]State the general word equation for the reaction between a metal and an acid.
(b)[1 mark]Write a balanced symbol equation for the reaction between magnesium and dilute sulfuric acid.
(c)[1 mark]State the general word equation for the reaction between a metal oxide and an acid.
(d)[2 marks]Name the salt and the other product formed when copper(II) oxide reacts with dilute hydrochloric acid.
Question 783
5 marks · Easy
Answer and see the solution →This question is about preparing soluble salts using different methods.
(a)[1 mark]State why it is necessary to use an excess of the solid when preparing copper(II) sulfate from copper(II) oxide and sulfuric acid.
(b)[1 mark]Give one reason why you do not use the same 'excess solid' method for making sodium sulfate using sodium hydroxide and sulfuric acid.
(c)[1 mark]Give the name of the technique used instead to make sodium sulfate from sodium hydroxide and sulfuric acid.
(d)[2 marks]Explain briefly how you know when to stop adding acid during the preparation of sodium sulfate by this technique.
Question 784
5 marks · Easy
Answer and see the solution →This question is about the formation of crystals when preparing soluble salts.
(a)[2 marks]Explain why crystallisation is used instead of evaporating to dryness when making hydrated copper(II) sulfate crystals.
(b)[3 marks]Describe, in order, the steps taken after completing a titration to obtain pure sodium sulfate crystals from sodium hydroxide and sulfuric acid.
Question 785
5 marks · Easy
Answer and see the solution →This question is about preparing soluble salts and writing chemical equations for their formation.
(a)[2 marks]Write the balanced chemical equation for the reaction used to prepare hydrated magnesium sulfate crystals using magnesium carbonate and dilute sulfuric acid.
(b)[1 mark]A student wants to prepare pure sodium chloride crystals from sodium hydroxide and hydrochloric acid. Write the balanced chemical equation for this reaction.
(c)[1 mark]State one key difference between the methods used for preparing magnesium sulfate crystals and sodium chloride crystals in the laboratory.
(d)[1 mark]Calculate the mass of sodium chloride produced when 0.100 mol of hydrochloric acid reacts completely with sodium hydroxide. (Relative formula mass, NaCl = 58.5)
Question 786
6 marks · Normal
Answer and see the solution →(a)[1 mark]State the general word equation for the reaction between an acid and a carbonate.
(b)[1 mark]A student reacts magnesium carbonate with dilute hydrochloric acid. Name the gas that is produced in this reaction.
(c)[2 marks]Ammonium carbonate is one example of a soluble carbonate. Using your knowledge of solubility rules, name two other types of carbonates that are also soluble in water.
(d)[2 marks]Give a reason, using solubility rules, why lead(II) carbonate is not a suitable choice to make a soluble salt by the reaction with an acid.
Question 787
6 marks · Normal
Answer and see the solution →(a)[2 marks]Write a balanced chemical equation for the reaction between sodium carbonate and dilute nitric acid.
(b)[4 marks]Describe how you would prepare a pure sample of sodium nitrate using the reaction in part a. Include the main steps and explain how you would separate and obtain the pure salt.
Question 788
1 mark · Easy
Answer and see the solution →State the colour change observed when ammonia gas is tested with damp red litmus paper.
Question 789
3 marks · Easy
Answer and see the solution →(a)[1 mark]Describe how anhydrous copper(II) sulfate can be used to test an unknown liquid for water.
(b)[1 mark]State the colour change you would see if water is present.
(c)[1 mark]Explain if this test indicates whether the water is pure.
Question 790
2 marks · Easy
Answer and see the solution →Explain why measuring the boiling point of a liquid is used to test the purity of water. What result should you obtain if the water sample is pure?