SO2⇒S⇒SO2⇒Na2SO4⇒BaSO4⇒SO2

Question

SO2⇒S⇒SO2⇒Na2SO4⇒BaSO4⇒SO2

Comments

ошибка в условии после SO2 => ....

Answer 1

SO2 + 2H2S = 3S↓ + 2H2O
S + O2 = SO2
SO2 + Na2O = Na2SO3
Na2SO3 + Ba(NO3)2 = BaSO3 + 2NaNO3
BaSO3 + 2HCl = BaCl2 + H2O + SO2↑