a) 2Ba + O₂ = 2BaO
BaO + H₂O = Ba(OH)₂
Ba(OH)₂ + 2HNO₃ = Ba(NO₃)₂ + 2H₂O
Ba(NO₃)₂ + Na₂SO₄ = BaSO₄↓ + 2NaNO₃
б) 4Al + 3O₂ = 2Al₂O₃
Al₂O₃ + 6HCl = 2AlCl₃ + 3H₂O
AlCl₃ + 3KOH = Al(OH)₃↓ + 3KCl
2Al(OH)₃ =t°= Al₂O₃ + 3H₂O
Al₂O₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 3H₂O
в) 2Fe + O₂ = 2FeO
FeO + 2HCl = FeCl₂ + H₂O
FeCl₂ + 2NaOH = Fe(OH)₂↓ + 2NaCl
Fe(OH)₂ =t°= FeO + H₂O
FeO + H₂SO₄ = FeSO₄ + H₂O
Объяснение:
а)
1. 2Ba + O2 ---> 2BaO
2. BaO + H2O ---> Ba(OH)2
3. Ba(OH)2 + 2HNO3 ---> Ba(NO3)2 + 2H2O
4. Ba(NO3)2 + Na2SO4 ---> BaSO4↓ + 2NaNO3
