1.na2s2o3+cl2+h2o= h2so4+nacl+hcl 2.na3[ircl6] + naoh+ h2o+o2= ir(oh)4 + nacl

1) Na2S2O3 + 4Cl2 + 5H2O = 2H2SO4 + 2NaCl + 6HCl:

2S+2 -8e- = 2S+6    | 8 | 8 | 1 |

Cl2 +2e- = 2Cl-        | 2 |    | 4 |;

2) 4Na3[IrCl6] + 12NaOH + 2H2O + O2 = 4Ir(OH)4 + 24NaCl:

Ir+3 -e- = Ir+4            | 1 | 4 | 4 |

O2 +4e- = 2(O)-2      | 4 |    | 1 |.