Pb(oh)2=PbO+H2O
Ni(OH)3= NiO(OH)+H2O
NaOH+SiO2= Na2SiO3+H2O
Cr2(SO4)3+NaOh=CrOh + Na2SO4
Co(NO3)2+NaOH= Co(OH)2+NaNO3
Al+HCL= AlCL3+H2
BaO+Hno3= Ba(NO3)2+H2O
FE2O3+H2SO4= Fe2(SO4)3+H2O
H2SO4+NaOH=H2O+ Na2SO4
H2S+NAOH= Na2S+ H2O
AgNo3+hcl=AgCl+HNO3
CuSO4+h2s=CuS+H2SO4