Ответ:

1)2HCl+Ba(OH)₂=BaCl₂+2H₂O

2H⁺+2Cl⁻+Ba²⁺+2OH⁻=Ba²⁺+2Cl⁻+2H₂O

HCl+AgNO₃=AgCl↓+HNO₃

H⁺+Cl⁻+Ag⁺+NO₃⁻=AgCl↓+H⁺+NO₃⁻

2HCl+K₂SO₃=2KCl+H₂O+SO₂↑

2H⁺+2Cl⁻+2K⁺+SO₃²⁻=2K⁺+2Cl⁻+H₂O+SO₂↑

2HCl+CuO=CuCl₂+H₂O

2H⁺+2Cl⁻+CuO=Cu²⁺+2Cl⁻+H₂O

NH₄OH + HCl = NH₄Cl + H₂O  

NH₄⁺ + OH⁻ + H⁺ + Cl⁻ = NH₄⁺ + Cl⁻ + H₂O