Ответ:
1) Fe²⁺+3Cl⁻+3Na⁺+3NO₃⁻⇄Fe³⁺+3NO₃⁻+3Na⁺+3CI⁻
2) 2AgNO₃+BaBr₂=2AgBr↓+Ba(NO₃)₂
2Ag⁺+2NO₃⁻+Ba²⁺+2Br⁻=2AgBr↓+Ba²⁺+3NO₃⁻
2Ag⁺+2Br⁻=2AgBr↓
3) H₂S+Pb(NO₃)₂=PbS↓+2HNO₃
2H⁺+S²⁻+Pb²⁺+2NO₃⁻=PbS↓+2H⁺+2NO₃⁻
Pb²⁺+S²⁻=PbS↓
4) Ca(OH)₂+2HCl=CaCI₂+2H₂O
Ca²⁺+2OH⁻+2H⁺+2Cl⁻=Ca²⁺+2CI⁻+2H₂O
2OH⁻+2H⁺=2H₂O
5) 3MgCl₂+2Na₃PO₄ =Mg₃(PO₄)₂↓+6NaCI
3Mg²⁺+6Cl⁻+6Na⁺+2PO₄³⁻=Mg₃(PO₄)₂↓+6Na⁺+6CI⁻
3Mg²⁺+2PO₄³⁻=Mg₃(PO₄)₂↓