NaOH→H2O→H2SO4→BaSO4→BaO→Ba(NO3)2
2NaOH → Na2O+H2O
SO3+H2O → H2SO4
H2SO4+Ba(OH)2 → BaSO4+2H2O
2BaSO4 → 2BaO + 2SO2 + O2
BaO+2HNO3 → Ba(NO3)2+H2O
NaOH→H2O→H2SO4→BaSO4→BaO→Ba(NO3)2
2NaOH → Na2O+H2O
SO3+H2O → H2SO4
H2SO4+Ba(OH)2 → BaSO4+2H2O
2BaSO4 → 2BaO + 2SO2 + O2
BaO+2HNO3 → Ba(NO3)2+H2O