What is the result when testing for group 7 ions?

Testing for group 7 ions, also known as halides, involves adding a silver nitrate solution to a sample that may contain halide ions. The silver ions react with the different halides to produce precipitates of varying colors.

When testing for chloride ions, the reaction forms a white precipitate of silver chloride when silver nitrate is added. This indicates the presence of chloride ions in the solution. The correct identification of chloride as yielding a white precipitate aligns with the known chemical properties of silver chloride.

Bromide and iodide ions generate colored precipitates: bromide forms a cream-colored precipitate, while iodide produces a yellow precipitate. Fluoride, on the other hand, does not yield a distinct precipitate in this test with silver nitrate; instead, it remains soluble. Understanding these characteristics is crucial for correctly identifying the color and type of precipitate formed during halide ion detection.