*3反应机理 HNO H2SO-HSO+H2O+NO2 H,0N02 产H,0++N02 H,S04+H20六H,+0+HS04 ()HNO3+2H2S0,→H,0*++NO2+2HS04 ②C+0 ®o, NO2 ⊙)eo,+Hs0, +HSO