1) BaO + 2HNO₃ => Ba(NO₃)₂ + H₂O
BaO + 2H⁺ + 2NO₃⁻ => Ba²⁺ + 2NO₃⁻ + H₂O
BaO + 2H⁺ => Ba²⁺ + H₂O
2) (NH₄)₂CO₃ + 2HNO₃ => 2NH₄NO₃ + CO₂↑ + H₂O
2NH₄⁺ + CO₃²⁻ + 2H⁺ + 2NO₃⁻ => 2NH₄⁺ + 2NO₃⁻ + CO₂ + H₂O
2H⁺ + CO₃²⁻ => CO₂ + H₂O
3) Al(OH)₃ + 3HNO₃ => Al(NO₃)₃ + 3H₂O
Al(OH)₃ + 3H⁺ + 3NO₃⁻ => Al³⁺ + 3NO₃⁻ + 3H₂O
Al(OH)₃ + 3H⁺ => Al³⁺ + 3H₂O
4) Cr₂O₃ + 6HNO₃ => 2Cr(NO₃)₃ + 3H₂O
Сr₂O₃ + 6H⁺ + 6NO₃⁻ => 2Cr³⁺ + 6NO₃⁻ + 3H₂O
Cr₂O₃ + 6H⁺ => 2Cr³⁺ + 3H₂O
5) Mg(OH)₂ + 2HNO₃ => Mg(NO₃)₂ + 2H₂O
Mg(OH)₂ + 2H⁺ + 2NO₃⁻ => Mg²⁺ + 2NO₃⁻ + 2H₂O
Mg(OH)₂ + 2H⁺ => Mg²⁺ + 2H₂O
6) K₂SO₃ + 2HNO₃ => 2KNO₃ + SO₂↑ + H₂O
2K⁺ + SO₃²⁻ + 2H⁺ + 2NO₃⁻ => 2K⁺ + 2NO₃⁻ + SO₂ + H₂O
2H⁺ + SO₃²⁻ => SO₂ + H₂O