Pb → PbO → PbO₂ → PbCl₂ → PbCl₄

1. Pb + O₂ → PbO \\ 2. PbO + H₂O₂ → PbO₂ + H₂O \\ 3. PbO₂ + HCl → PbCl₂ + Cl₂ + H₂O \\ 4. PbCl₂ + Cl₂ → PbCl₄