Why is hydrochloric acid not used to acidify a sample before the halide test?
It adds chloride ions that could give a false result
It would react with any carbonate ions present
It would form a white precipitate with barium ions
It would remove the halide ions from the solution
35 exam-style questions on Edexcel GCSE Chemistry 10.1 Qualitative analysis: tests for ions, covering 10.1.1 Principles of ion tests and flame tests, 10.1.2 Tests for cations and for ammonia, 10.1.3 Tests for anions, 10.1.4 Identification of ions in unknown salts, and 10.1.5 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.