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Definition of PbO2
PbO2, also known as Lead(IV) oxide or Lead dioxide in English, is a colourless or brown-black solid. PbO2 has an atomic mass of 239.2 g/mol. Its molecular structure consists of two oxygen atoms and one lead atom. In PbO2, lead is in the +4 oxidation state, forming a Pb4+ ion. -
Properties of PbO2
PbO2 is a brown-black solid with no distinctive odour. Regarding pH, PbO2 is strongly acidic. In terms of chemical properties, PbO2 is a strong oxidizing agent. -
Common chemical equations of PbO2
Metal reaction: PbO2 can react with metals such as Al, Fe, Zn to form other metal oxides and produce lead metal.
Acid reaction: PbO2 can react with acids such as HCl, H2SO4 to form lead salts and produce water.
Non-metal reaction: PbO2 can also react with non-metals such as S, P, C to form non-metal oxides and produce lead metal.
Reaction with salts: PbO2 can react with salts such as NaCl, KCl to form lead salts and produce sodium or potassium metal. -
Synthesis of PbO2
In the laboratory, PbO2 is usually prepared from lead or lead (II) oxide in an oxygen environment or from the electrolysis of a lead salt solution. On the industrial scale, PbO2 is typically produced from the oxidation of lead with oxygen or the reaction between Pb3O4 and oxygen.