Question

S-> SO2 -> SO3-> H2SO4 -> H2->H2S -> Na2S

Answer 1

S+O2--->SO2 (t^o)

2SO2+O2--->2SO3 (xúc tác ,t^o)

SO3+H2O--->H2SO4

Fe+H2SO2--->FeSO4+H2

H2+S--->H2S (t^o)

H2S+2NaOH--->Na2S+2H2O