A technician tests solutions used in a ceramic workshop. Each solution contains only one type of metal ion.
A clean nichrome wire and a roaring blue Bunsen flame are available.
Describe how the technician should use the equipment to obtain a flame-test result for the solution.
The solution produces an orange-red flame.
Give the metal ion present.
The technician adds sodium hydroxide solution drop by drop and then in excess to a fresh sample of the solution.
Give two observations that would confirm the flame-test identification.
A second solution forms a white precipitate with sodium hydroxide solution. The precipitate dissolves when excess sodium hydroxide solution is added.
Give the metal ion in this solution.
93 exam-style questions on AQA GCSE Chemistry 8.3 Identification of ions by chemical and spectroscopic means, covering 8.3.1 Flame tests, 8.3.2 Metal hydroxides, 8.3.3 Carbonates, 8.3.4 Halides, 8.3.5 Sulfates, 8.3.6 Instrumental methods, and 8.3.7 Flame emission spectroscopy. Each one has a worked solution and a mark scheme showing where the marks go.