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
101–110 of 136 · Hard
Question 101
2 marks · Hard
Answer and see the solution →State two steps you must carry out before starting to add alkali from a burette in a titration experiment between hydrochloric acid and sodium hydroxide. Do not include steps taken during or after the addition of alkali.
Question 102
5 marks · Hard
Answer and see the solution →A student is asked to carry out an acid-alkali titration to determine the volume of sulfuric acid needed to neutralise 25.0 cm³ of sodium hydroxide solution.
(a)[2 marks]Describe, in order, four steps the student should take to set up the experiment before beginning the titration.
(b)[2 marks]Explain why phenolphthalein is a suitable indicator for this titration, and why universal indicator should not be used.
(c)[1 mark]State how the student would recognise the endpoint of the titration.
Question 103
2 marks · Hard
Answer and see the solution →During a titration, a student adds hydrochloric acid to sodium hydroxide solution from a burette. The student does a 'rough titration' first, then repeats the procedure more carefully. Explain the purpose of doing a rough titration, and describe one way to increase accuracy when repeating the titration.
Question 104
2 marks · Hard
Answer and see the solution →Sodium carbonate reacts with dilute hydrochloric acid.
Write the word equation for this reaction and name the gas produced.
Question 105
5 marks · Hard
Answer and see the solution →A piece of magnesium ribbon is added to dilute ethanoic acid in a test tube.
(a)[2 marks]Describe what you would observe during the reaction.
(b)[2 marks]Write a balanced chemical equation for this reaction.
(c)[1 mark]State one way you could test the gas given off and describe the result you would expect.
Question 106
2 marks · Hard
Answer and see the solution →In terms of proton transfer, explain the difference between an acid and a base.
Question 107
2 marks · Hard
Answer and see the solution →State the general word equation for the reaction between an acid and a metal oxide. Your answer should refer to the type of products formed.
Question 108
5 marks · Hard
Answer and see the solution →Lead(II) oxide reacts with sulfuric acid in a laboratory experiment.
(a)[1 mark]Name the type of chemical reaction that takes place.
(b)[2 marks]Give the names of the products formed in this reaction.
(c)[1 mark]Write a word equation for the reaction.
(d)[1 mark]Give a chemical symbol equation for the reaction.
Question 109
2 marks · Hard
Answer and see the solution →Explain why the reaction between an acid and a metal oxide is called a neutralisation reaction. Use your knowledge of ions to support your answer.
Question 110
2 marks · Hard
Answer and see the solution →State the general word equation for the reaction of a carbonate with an acid. Identify all the types of products that are always formed in this reaction.