а) 3Ba(OH)₂ + 2Cr(NO₃)₃ → 3Ba(NO₃)₂ + 2Cr(OH)₃↓
Cr³⁺+3OH⁻→Cr(OH)₃↓
б) FeCl₃ + 3AgNO₃→3AgCl↓+Fe(NO₃)₃
Ag⁺+Cl⁻→AgCl↓
в) Mg(OH)₂+2HBr→MgBr₂+2H₂O
Mg(OH)₂+2H⁺→Mg²⁺+2H₂O
а) 3Ba(OH)₂ + 2Cr(NO₃)₃ → 3Ba(NO₃)₂ + 2Cr(OH)₃↓
Cr³⁺+3OH⁻→Cr(OH)₃↓
б) FeCl₃ + 3AgNO₃→3AgCl↓+Fe(NO₃)₃
Ag⁺+Cl⁻→AgCl↓
в) Mg(OH)₂+2HBr→MgBr₂+2H₂O
Mg(OH)₂+2H⁺→Mg²⁺+2H₂O