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
131–136 of 136 · Hard
Question 131
2 marks · Hard
Answer and see the solution →A student is given a solution that may contain sodium carbonate. Describe two distinct observations the student would expect to make when dilute hydrochloric acid is added to this solution if carbonate ions are present.
Question 132
5 marks · Hard
Answer and see the solution →You are given a solid sample labelled 'unknown.' It could be one of the following: magnesium sulfate, sodium carbonate, or potassium chloride.
(a)[2 marks]Describe how you would carry out a chemical test to determine whether this solid contains carbonate ions. Include the reagents and apparatus you would use.
(b)[1 mark]Suppose the unknown is sodium carbonate. Write the ionic equation for its reaction with hydrochloric acid.
(c)[2 marks]Explain how you would confirm that the gas produced in the reaction is carbon dioxide.
Question 133
2 marks · Hard
Answer and see the solution →A solution of potassium carbonate is added to excess dilute nitric acid in a test tube. The student's teacher tells them to test any gas produced with limewater. Explain why limewater is used in this test and state the result that shows carbonate ions were present.
Question 134
2 marks · Hard
Answer and see the solution →Explain why nitric acid must be added before silver nitrate when testing a solution for halide ions. Include what could happen if this step is skipped or done in the wrong order.
Question 135
5 marks · Hard
Answer and see the solution →When silver nitrate solution is added to separate solutions of sodium chloride, sodium bromide and sodium iodide (each has first been acidified with dilute nitric acid), different precipitates form.
(a)For each solution, name the precipitate formed and state its colour.
(i)[1 mark]Sodium chloride solution:
(ii)[1 mark]Sodium bromide solution:
(iii)[1 mark]Sodium iodide solution:
(b)Give the chemical formula for the precipitate formed in each case.
(i)[1 mark]From sodium chloride:
(ii)[1 mark]From sodium iodide:
Question 136
2 marks · Hard
Answer and see the solution →Describe the steps you would take to test a solution to determine whether it contains any halide ions (chloride, bromide, or iodide) using silver nitrate.