Ba-BaO-Ba(OH)2-BaSO4-BaCl2-BaO-Ba

Question

Ba-BaO-Ba(OH)2-BaSO4-BaCl2-BaO-Ba

Answer 1

2Ba + O2 = 2BaO
BaO + H2O = Ba(OH)2
Ba(OH)2 + H2SO4 = BaSO4 + 2H2O
BaSO4 + 2HCl = BaCl2 + H2SO4
BaCl2 + H2O = BaO + 2HCl
BaO + H2 = H2O + Ba или 2BaO = Ba + O2