Ba → BaO → Ba ' ( OH ) 2 → BaCO3 → Ba'O

Question

Ba → BaO → Ba ' ( OH ) 2 → BaCO3 → Ba'O

Answer 1

2Ba + O2 = 2BaO
BaO + H2O = Ba(OH)2
Ba(OH)2 + CO2 = BaCO3 + H2O
BaCO3 ---t--- > BaO + CO2