ZnO+H2O=Zn(OH)2
Zn(OH)2+2LiOH=Li2ZnO2+2H2O
Li2ZnO2+2HCl=Zn(OH)2+2LiCl
Zn(OH)2=ZnO+H2O
ZnO+H2=Zn+H2O
CuO+H2SO4=CuSO4+H2O
CuSO4+2KOH=Cu(OH)2+K2SO4
Cu(OH)2=CuO+H2O
CuO+H2=Cu+H2O
S+O2=SO2
SO2+KOH=KHSO3
KHSO3+KOH=K2SO3+H2O
K2SO3+BaCl2=BaSO3+2KCl
BaSO3+2HCl=BaCl2+SO2+H2O
BaCl2+2KOH=Ba(OH)2+2KCl