An environmental chemist is analyzing a water-soluble solid residue suspected to be calcium bromide, CaBr2\text{CaBr}_2CaBr2, obtained from an industrial discharge.
Plan an experimental procedure that the chemist could conduct to confirm the presence of both calcium ions and bromide ions in this residue.
The chemist is provided with:
In your plan, you must outline the steps for both tests and describe the specific observations that would confirm the presence of each ion.
Identify one instrumental method that could be employed to detect the presence of calcium ions in the sample.
Give one benefit of utilizing this instrumental method over traditional chemical flame testing.
29 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.