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
841–850 of 869
Question 841
2 marks · Normal
Answer and see the solution →State two reasons why nitric acid is used, and not hydrochloric acid, when testing for halide ions with silver nitrate.
Question 842
4 marks · Normal
Answer and see the solution →(a)[2 marks]Name the compounds formed when silver nitrate is added to solutions containing (i) chloride, (ii) bromide, and (iii) iodide ions.
(b)[2 marks]Give the colour of each compound formed in part (a).
Question 843
2 marks · Normal
Answer and see the solution →State the names and colours of the precipitates formed when silver nitrate is added to (a) a solution containing bromide ions and (b) a solution containing iodide ions, after acidification with nitric acid.
Question 844
4 marks · Normal
Answer and see the solution →(a)[3 marks]Describe the steps you would take to test a sample for iodide ions using silver nitrate. Include all reagents added and any important precautions.
(b)[1 mark]What result would indicate that iodide ions are present?
Question 845
3 marks · Normal
Answer and see the solution →A student tests three unknown solutions by first adding dilute nitric acid and then silver nitrate solution. The results are:
Observations for unknown solutions after addition of silver nitrate Solution Observation A white precipitate B cream precipitate C no visible change Question 846
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 847
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 848
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.
Question 849
5 marks · Easy
Answer and see the solution →This question is about testing for gases and for halide ions.
(a)[2 marks]Describe the chemical test for ammonia gas and state the positive result.
(b)A student wants to identify whether a colourless solution contains chloride ions.
i. State how the student would carry out a test for chloride ions.
ii. Name the precipitate formed and give its colour if chloride ions are present.
(i)[2 marks](ii)[1 mark]Question 850
5 marks · Easy
Answer and see the solution →This question is about observations when testing for ammonia gas and chloride ions.
(a)[1 mark]State what you would observe when ammonia gas is tested with damp universal indicator paper.
(b)A student adds dilute nitric acid and then silver nitrate solution to a solution of sodium chloride.
i. State the appearance of the precipitate formed.
ii. Give the name of the precipitate.
(i)[1 mark](ii)[1 mark](c)[2 marks]Explain why nitric acid is added before silver nitrate when testing for chloride ions.