S2O32-+10OH--8e-=2SO42-+5H2OClO-+H2O+2e-=Cl-+2OH- *4Na2S2O3+4NaClO+2OH-=2Na2SO4+4NaCl+H2O
Na2S2O3 4NaClO H2O=4NaCl 2NaHSO40