Plumbite

In chemistry, plumbite is the PbO2−2 oxyanion or hydrated forms, or any salt containing this anion. In these salts, lead is in the oxidation state +2. It is the traditional term for the IUPAC name plumbate(II). For example, lead(II) oxide (PbO) dissolves in alkali to form salts containing the HPbO−2 anion: PbO + OH− → HPbO−2 Lead(II) hydroxide also dissolves in excess alkali to form the Pb(OH)4−6 anion: Pb(OH)2 + 4 OH− → Pb(OH)4−6 The plumbite ion is a weak reducing agent. When it functions as one, it is oxidized to the plumbate ion. (Wikipedia).