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
341–350 of 359 · Easy
Question 341
1 mark · Easy
Answer and see the solution →State why nitric acid is added before silver nitrate when testing a solution for halide ions.
Question 342
3 marks · Easy
Answer and see the solution →(a)[1 mark]Describe what should be added to a solution to test for chloride ions using silver nitrate.
(b)[2 marks]State which chemical is added first and explain why that order is important in the test.
Question 343
2 marks · Easy
Answer and see the solution →A student adds silver nitrate solution to acidified solutions of three unknown salts. She observes the following: - Salt A: forms a white precipitate - Salt B: forms a cream precipitate - Salt C: forms a yellow precipitate Calculate the number of different halide ions identified and state the expected observation for each positive test.
Question 344
2 marks · Easy
Answer and see the solution →Explain why hydrochloric acid must not be used instead of nitric acid when testing for halide ions with silver nitrate.
Question 345
3 marks · Easy
Answer and see the solution →The table shows the precipitates formed when different halide ions react with silver nitrate. Ion in solution Observation after adding silver nitrate Cl^- White precipitate Br^- Cream precipitate I^- Yellow precipitate Use the information in the table to answer the following questions.
(a)[1 mark]State the name and colour of the precipitate formed when a solution containing bromide ions is tested with silver nitrate.
(b)[1 mark]Identify which ion produces a yellow precipitate with silver nitrate.
(c)[1 mark]A student obtains a white precipitate when testing their solution with silver nitrate. Which halide ion is present?
Question 346
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the observation when a solution containing iodide ions is tested with silver nitrate.
(b)[1 mark]State the observation when a solution containing chloride ions is tested with silver nitrate.
(c)[1 mark]State the observation when a solution containing bromide ions is tested with silver nitrate.
Question 347
1 mark · Easy
Answer and see the solution →State the reagent that must be added to a solution before silver nitrate to test for chloride, bromide, or iodide ions.
Question 348
2 marks · Easy
Answer and see the solution →A student adds silver nitrate to a solution to test for chloride ions. Before adding the silver nitrate, they add hydrochloric acid by mistake instead of another reagent. Explain, using your knowledge of chemical tests, why this mistake could affect the test result.
Question 349
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 350
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.