Объяснение:
1) Pb(NO₃)₂ + 2KI = PbI₂↓ + 2KNO₃
Pb²⁺ + 2NO₃⁻ + 2K⁺ + 2I⁻ = PbI₂↓ + 2K⁺ + 2NO₃⁻
Pb²⁺ + 2I⁻ = PbI₂↓
2) Na₂S + 2HCl = 2NaCl + H₂S↑
2Na⁺ + S²⁻ + 2H⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + H₂S↑
2H⁺ + S²⁻ = H₂S↑
3) 3KOH + H₃PO₄ = K₃PO₄ + 3H₂O
3K⁺ + 3OH⁻ + 3H⁺ + PO₄³⁻ = 3K⁺ + PO₄³⁻ + 3H₂O
H⁺ + OH⁻ = H₂O
Объяснение:
1) Pb(NO₃)₂ + 2KI = PbI₂↓ + 2KNO₃
Pb²⁺ + 2NO₃⁻ + 2K⁺ + 2I⁻ = PbI₂↓ + 2K⁺ + 2NO₃⁻
Pb²⁺ + 2I⁻ = PbI₂↓
2) Na₂S + 2HCl = 2NaCl + H₂S↑
2Na⁺ + S²⁻ + 2H⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + H₂S↑
2H⁺ + S²⁻ = H₂S↑
3) 3KOH + H₃PO₄ = K₃PO₄ + 3H₂O
3K⁺ + 3OH⁻ + 3H⁺ + PO₄³⁻ = 3K⁺ + PO₄³⁻ + 3H₂O
H⁺ + OH⁻ = H₂O