posted by Kay on .
I add 5 drops Potassium Iodide (KI) to 5 drops lead nitrate (PbNO3). The solution is centrifuged and the aqueous layer is discarded. I then add 5 drops of nitric acid (HNO3), 5 drops of hydrogen peroxide and 10 drops of dichloroethane (C2H4Cl2) to the precipitate.
The solution is shaken and lightly heated resulting in a clear aqueous solution with a deep red precipitate.
What anions are present in the precipitate? How do you know?
Appreciate the help.
From your description, I think you have formed red lead oxide (Pb3O4), The oxide ion is present in the ppt.