What cation gives a white precipitate with alkali metal salts or ammonium salts?

Barium ions (Ba²⁺) are known to produce a white precipitate when they react with sulfate ions, forming barium sulfate (BaSO₄). This reaction can occur in the presence of alkali metal salts or ammonium salts that provide sulfate ions. Additionally, lead (II) ions (Pb²⁺) can also form white precipitates, such as lead(II) chloride (PbCl₂) with alkali metal chlorides.