Помогите.........................................................................................................................................
S+O2=SO2 SO2+H2O=H2SO3 H2SO3+2Na(OH)=Na2SO3+2H2O Na2SO3+BaCl2=2NaCl+BaSO3 2NaHSO4 + BaSO3 = Na2SO4 + BaSO4 + SO2 + H2O
