1 - Д
BaO + SO₃ = BaSO₄
BaO + H₂SO₄ = BaSO₄ + H₂O
2 - A
SO₃ + H₂O = H₂SO₄
SO₃ + 2KOH = K₂SO₄ + H₂O
3 - Б
2HCl + Cu(OH)₂ = CuCl₂ + 2H₂O
2HCl + K₂O = 2KCl + H₂O
4 - Г
NaOH + HNO₃ = NaNO₃ + H₂O
2AgNO₃ + 2NaOH = 2NaNO₃ + Ag₂O↓ + H₂O
1 - Д
BaO + SO₃ = BaSO₄
BaO + H₂SO₄ = BaSO₄ + H₂O
2 - A
SO₃ + H₂O = H₂SO₄
SO₃ + 2KOH = K₂SO₄ + H₂O
3 - Б
2HCl + Cu(OH)₂ = CuCl₂ + 2H₂O
2HCl + K₂O = 2KCl + H₂O
4 - Г
NaOH + HNO₃ = NaNO₃ + H₂O
2AgNO₃ + 2NaOH = 2NaNO₃ + Ag₂O↓ + H₂O