testing for negative ions
Tests for carbonates:
- dilute acid to a carbonate, it fizzes and produces carbon dioxide gas.
Tests for halides:
- add nitric acid to dissolve in the compound and to remove only carbonate ions. forms a precipitate with silver ions. (iodide, yellow precipitate)(bromide, cream precipitate)(chloride, white precipitate)
Tests for sulfates:
add hydrochloric acid, followed by barium chloride solution. then add the acid which will then form a white precipitate.