Select@reaction@System
H + X2 HX + X (X=F,Cl)
CO2 + nH2O H2CO3 + H2O (n=1,2)
SO3 + H2O H2SO4
N2O4 + H2O HNO3 + HNO2
Diels-Alder reaction
C6H4(CO)2O + H2O C6H4(COOH)2
CH3COOH + C6H5NH2 C6H5NHCOCH3 + H2O