Ba(OH)2 + HNO3 = KOH + H2SIO3 = Al(OH)3 + HCl = Zn(OH)2 + H2SO4 = K3PO4 + HBr = AgNO3 + HBr = MgCO3 + HBr = K2CO3 + HNO3 = Fe + H2SO4 (разб) = Mg + H2SO4 (разб) = Fe + HCl = Al + HCl = Al + H2SO4 (конц) = Fe + H2SO4 (конц) = Mg + H2SO4 (конц) = P + H2SO4 (конц) =

Here are the balanced chemical equations for the given reactions: 1. **Ba(OH)₂ + 2 HNO₃ → Ba(NO₃)₂ + 2 H₂O** 2. **KOH + H₂SiO₃ → K₂SiO₃ + 2 H₂O** (Note: This reaction usually is an acid-base reaction where silicic acid reacts with potassium hydroxide.) 3. **Al(OH)₃ + 3 HCl → AlCl₃ + 3 H₂O** 4. **Zn(OH)₂ + H₂SO₄ → ZnSO₄ + 2 H₂O** 5. **K₃PO₄ + 3 HBr → 3 KBr + H₃PO₄** 6. **AgNO₃ + HBr → AgBr + HNO₃** 7. **MgCO₃ + 2 HBr → MgBr₂ + H₂O + CO₂** 8. **K₂CO₃ + 2 HNO₃ → 2 KNO₃ + H₂O + CO₂** 9. **Fe + H₂SO₄ (разб) → FeSO₄ + H₂ (reduced iron sulfate with hydrogen gas)** 10. **Mg + H₂SO₄ (разб) → MgSO₄ + H₂ (produces magnesium sulfate and hydrogen gas)** 11. **Fe + 2 HCl → FeCl₂ + H₂** 12. **2 Al + 6 HCl → 2 AlCl₃ + 3 H₂** 13. **2 Al + 3 H₂SO₄ (конц) → Al₂(SO₄)₃ + 3 H₂** 14. **Fe + 2 H₂SO₄ (конц) → Fe₂(SO₄)₃ + 2 H₂O + SO₂** 15. **Mg + 2 H₂SO₄ (конц) → MgSO₄ + H₂ + SO₂** 16. **P + 5 H₂SO₄ (конц) → H₃PO₄ + 5 SO₂ + 2 H₂O** These reactions represent the acid-base neutralization and the reaction of metals with acids, both in dilute and concentrated forms. If you have specific questions about any of these reactions, feel free to ask!