Identifying gases and ions

5 lessons in Chemical analysis.

26 exam questions · 41 marks

8.4 Tests for gases The tests and positive results for hydrogen, oxygen, carbon dioxide and chlorine, and how to carry them out safely. AQA Edexcel OCR 5 questions 8.5 Flame tests and metal hydroxides How to identify metal ions using flame tests and the colours of their hydroxide precipitates with sodium hydroxide solution, and the test for ammonium ions. Separate only AQA Edexcel OCR 6 questions 8.6 Tests for carbonate, halide and sulfate ions How to test for carbonate ions with dilute acid and limewater, for chloride, bromide and iodide ions with nitric acid and silver nitrate, and for sulfate ions with hydrochloric acid and barium chloride. Separate only AQA Edexcel OCR 5 questions 8.7 Required practical: identifying ions How to use flame tests, sodium hydroxide precipitates and tests for carbonate, halide and sulfate ions in order to identify the positive and negative ions in an unknown ionic compound. Separate only AQA Edexcel OCR 5 questions 8.8 Instrumental methods and flame emission spectroscopy The advantages of instrumental methods of analysis, how flame emission spectroscopy identifies metal ions from their line spectra, and how a calibration curve is used to find the concentration of an ion in a solution. Separate only AQA Edexcel OCR 5 questions