S (Fe,t) --> X1 (O2,t) --> X2 (O2,kat) --> X3 (NaOH, недостаток) --> X4 (NaOH,...

Question

S (Fe,t) --> X1 (O2,t) --> X2 (O2,kat) --> X3 (NaOH, недостаток) --> X4 (NaOH, недостаток) --> X5

Answer 1

S+Fe=FeS
2FeS+3O2=2FeO+2SO2
2SO2+O2=2SO3
SO3+NaOH=NaHSO4
NaHSO4+NaOH=Na2SO4+H2O