Question

BaO+H2O=
CuCl2+H2SO4=
Al2O3+H2=
CO2+KOH=
SO2+H2O=

Answer 1

BaO+H2O=Ba(OH)2; 

CuCl2+H2SO4=CuSO4+2HCl; 

Al2O3+3H2= 2Al + 3H2O;

CO2+2KOH= K2CO3 + H2O или KOH + CO2 = KHCO3;

SO2+H2O=H2SO3.