1) H2SO4+BA(OH)2=BaSO4+2H2O
2H(+) +SO4(2-) + Ba(2+) + 2OH(-)=BaSO4+2H2O
2)FeCl3+3NH4OH=Fe(OH)3+3NH4Cl
Fe(3+) 3Cl(-) +3NH4(+) +3OH(-) = Fe(OH)3+3NH4(+) + 3Cl(-)
Fe(3+) 3OH(-) =Fe(OH)3
3) CH3COONa+HCl=CH3COOH+NaCl
CH3COO(-) +Na(+) + H(+)+CL(-) =CH3COOH +Na(+) +Cl(-)
CH3COO(-) +H(+)+CL(-)= CH3COOH +Cl(-)