Ответ:
Объяснение:
а)
CaCl₂ + Na₂CO₃ = CaCO₃↓ + 2NaCl
Ca²⁺ + 2Cl⁻ + 2Na⁺ + CO₃²⁻ = CaCO₃↓ + 2Na⁺ + 2Cl⁻
Са²⁺ +СО₃²⁻ = СаСО₃↓
b)
PbSO₄ + 2NaCl= PbCl₂↓ + Na₂SO₄
Pb²⁺ + SO₄²⁻ + 2Na⁺ + 2Cl⁻ = PbCl₂↓ +2Na⁺ +SO₄²⁻
Pb²⁺ + 2Cl⁻ = PbCl₂↓
c)
HCl + NaOH = NaCl + H₂O
H⁺ + Cl⁻ + Na⁺ + OH⁻ = Na⁺ + Cl⁻ + H₂O
H⁺ + OH⁻ = H₂O
d)
Nа₂CО₃ + 2HCl = 2NaCl + H₂CO₃
2Na⁺ + CО₃²⁻ + 2H⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + СО₂↑ + H₂O
CO₃²⁻ + 2H⁺ = H₂O + CO₂↑
№4
3ZnSO₄ + 2K₃PO₄ = Zn₃(PO₄)₂ + 3K₂SO₄
3Zn²⁺ + 3SO₄²⁻ + 6K⁺ + 2PO₄³⁻ = Zn₃(PO₄)₂ + 6K⁺ + 3SO₄²⁻
3Zn²⁺ + 2PO₄³⁻ = Zn₃(PO₄)₂
Zn(OH)₂ + H₂SO₄ = ZnSO₄ + 2H₂O
Zn(OH)₂ + 2H⁺ + SO₄²⁻ = Zn²⁺ + SO₄²⁻ + 2H₂O
Zn(OH)₂ + 2H⁺ = Zn²⁺ + 2H₂O
с)
Pb(NO₃)₂ + 2KOH = Pb(OH)₂↓ + 2KNO₃
Pb²⁺ + 2NO₃⁻ + 2K⁺ + 2OH⁻ = Pb(OH)₂↓ + 2K⁺ + 2NO3⁻
Pb²⁺ + 2OH⁻ = Pb(OH)2↓
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Verified answer
Ответ:
Объяснение:
а)
CaCl₂ + Na₂CO₃ = CaCO₃↓ + 2NaCl
Ca²⁺ + 2Cl⁻ + 2Na⁺ + CO₃²⁻ = CaCO₃↓ + 2Na⁺ + 2Cl⁻
Са²⁺ +СО₃²⁻ = СаСО₃↓
b)
PbSO₄ + 2NaCl= PbCl₂↓ + Na₂SO₄
Pb²⁺ + SO₄²⁻ + 2Na⁺ + 2Cl⁻ = PbCl₂↓ +2Na⁺ +SO₄²⁻
Pb²⁺ + 2Cl⁻ = PbCl₂↓
c)
HCl + NaOH = NaCl + H₂O
H⁺ + Cl⁻ + Na⁺ + OH⁻ = Na⁺ + Cl⁻ + H₂O
H⁺ + OH⁻ = H₂O
d)
Nа₂CО₃ + 2HCl = 2NaCl + H₂CO₃
2Na⁺ + CО₃²⁻ + 2H⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + СО₂↑ + H₂O
CO₃²⁻ + 2H⁺ = H₂O + CO₂↑
№4
а)
3ZnSO₄ + 2K₃PO₄ = Zn₃(PO₄)₂ + 3K₂SO₄
3Zn²⁺ + 3SO₄²⁻ + 6K⁺ + 2PO₄³⁻ = Zn₃(PO₄)₂ + 6K⁺ + 3SO₄²⁻
3Zn²⁺ + 2PO₄³⁻ = Zn₃(PO₄)₂
b)
Zn(OH)₂ + H₂SO₄ = ZnSO₄ + 2H₂O
Zn(OH)₂ + 2H⁺ + SO₄²⁻ = Zn²⁺ + SO₄²⁻ + 2H₂O
Zn(OH)₂ + 2H⁺ = Zn²⁺ + 2H₂O
с)
Pb(NO₃)₂ + 2KOH = Pb(OH)₂↓ + 2KNO₃
Pb²⁺ + 2NO₃⁻ + 2K⁺ + 2OH⁻ = Pb(OH)₂↓ + 2K⁺ + 2NO3⁻
Pb²⁺ + 2OH⁻ = Pb(OH)2↓