Test with Iodide Ions
- Iodide ions will form precipitate with lead(II) ions and copper(II) ions.
- However, in SPM you only need to know the reaction between lead(II) ions and iodide ions.
- The yellow precipitate formed will dissolve in hot water.
Pb2+ + 2I– → PbI2
Yellow precipitate. Dissolve in hot water
A red brown solution formed.
White precipitate form in brown solution