Solution of silver nitrate (AgNO3): Silver nitrate forms a white precipitate of silver fluoride (AgF) when added to a solution containing fluoride ions.

Calcium chloride (CaCl2): Calcium chloride forms a white precipitate of calcium fluoride (CaF2) when added to a solution containing fluoride ions.

Lead acetate (Pb(C2H3O2)2): Lead acetate forms a yellow precipitate of lead fluoride (PbF2) when added to a solution containing fluoride ions.

Zirconium sulfate (Zr(SO4)2): Zirconium sulfate forms a white precipitate of zirconium fluoride (ZrF4) when added to a solution containing fluoride ions.

Potassium alum (KAl(SO4)2): Potassium alum forms a white precipitate of potassium fluoride (KF) when added to a solution containing fluoride ions.

Barium chloride (BaCl2): Barium chloride forms a white precipitate of barium fluoride (BaF2) when added to a solution containing fluoride ions.