Cl₂+Fe -> Cl₂+Zn -> Cl₂+H2 -> Cl₂+Na -> Cl₂+Cu -> Cl₂+H₂O ->
2fe + 3cl2 -> 2fecl3 cl2 + zn -> zncl2 cl2 + 2na -> 2nacl cl2 + cu -> cucl2 cl2 + h2o -> hcl + hclo3