A technician tests two fresh samples of a solution.
| Test | Procedure | Result |
|---|---|---|
| A | Add dilute hydrochloric acid, then silver nitrate solution | White precipitate |
| B | Add dilute nitric acid, then silver nitrate solution | No precipitate |
Explain why the result of Test A cannot be used to show that the solution contains chloride ions.
State what the result of Test B shows about the solution.
107 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.