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.