关于硫的氧化还原反应硫单质负2价硫它们参加的所有氧化还原反应反应有什么规律吗?

2S2― + SO32― +6H+ ＝ 3S↓ + 3H2O
S(固) + O2(气) ＝ SO2(气)
H2S+Fe＝FeS+H2↑
H2S+CuCl2＝CuS↓+2HCl
H2S+2AgNO3＝Ag2S↓+2HNO3
H2S+HgCl2＝HgS↓+2HCl
H2S+Pb(NO3)2＝PbS↓+2HNO3
Fe+S =FeS
2H2S+3O2(足量)＝2SO2+2H2O
2H2S+O2(少量)＝2S+2H2O
2H2S+SO2＝3S+2H2O
H2S+H2SO4(浓)＝S↓+SO2+2H2O
3H2S+2HNO3(稀)＝3S↓+2NO+4H2O
5H2S+2KMnO4+3H2SO4＝2MnSO4+K2SO4+5S+8H2O
H2S+4Na2O2+2H2O＝Na2SO4+6NaOH
Mg+H2S＝MgS+H2
S+O2 SO2
S+6HNO3(浓)＝H2SO4+6NO2↑+2H2O
3S+4 HNO3(稀)＝3SO2↑+4NO↑+2H2O