Question

Ba–BaO–Ba(OH)2–BaCO3–Ba(NO3)2
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Ba(ON)2–BaO–BaCl2

Answer 1

1) 2Ba + O₂ = 2BaO
2) BaO + H₂O = Ba(OH)₂
3) Ba(OH)₂ + СО2= BaCO₃↓ + Н2О
4) BaCO₃ + 2HNO₃ = H₂O + CO₂ + Ba(NO₃)₂
5) Ba + 2H2О = Ba(ОН)₂ + H₂
6) Ba(ОН)₂ → BaO + Н2О
7) BaO + 2HCI = BaCI₂ + H₂O