а)
S+H2=H2S
H2S+3O2=2H2O+2SO2 SO2+NaOH=NaHSO3
б)
Zn + H2S = ZnS + H2
Zn + H2 = H2S + Zn
H2S + O2 = SO2 + H2
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
а)
S+H2=H2S
H2S+3O2=2H2O+2SO2
SO2+NaOH=NaHSO3
б)
Zn + H2S = ZnS + H2
Zn + H2 = H2S + Zn
H2S + O2 = SO2 + H2
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4