Answer:
The answer is "Strontium iodide and [tex]SrI_2[/tex]".
Explanation:
In the flames test, two ionic metals give red fire. It was calcium (Ca, which gives a red brick flame) and strontium (Sr, which gives a persistent red flame). Both Ca and Sr respond to insoluble carbonate with ammonium carbonate. Ca and Sr produce insoluble ammonium phosphate phosphates. Even then, the water is reactive with calcium sulfate (CaSO4) whereas the strontium sulfate (SrSO4) is illiquid. Because the metal ion formed 3 precipitates, they can't get Ca, and we have Sr as its metal.
The hexane of its halide gives a violet color which would be typical of iodide (I-).
Strontium iodide is the chemical name of the unknown ionic compound.
Strontium iodide's chemical formula is [tex]SrI_2[/tex].