A student wants to identify the ions contained in a solid, Y.
She dissolves the solid in some water and then does some tests on the solution.
Look at the table of her results.
| Test | Method | Observations |
|---|---|---|
| Test 1 | Flame test | Yellow flame seen |
| Test 2 | Add dilute sodium hydroxide solution | Brown precipitate forms |
| Test 3 | Add dilute nitric acid, then silver nitrate solution | Yellow precipitate forms |
| Test 4 | Add dilute hydrochloric acid, then barium chloride solution | White precipitate forms |
Describe how the student does the flame test in Test 1.
The student thinks that solid Y contains only iron(III) ions, Fe3+\text{Fe}^{3+}Fe3+, and iodide ions, I−\text{I}^-I−.
Use her results to explain if she is correct.