Объяснение:
1. Na₂CO₃ + 2HNO₃ = 2NaNO₃ + H₂O + CO₂
2Na⁺ + CO₃²⁻ + 2H⁺ + 2NO₃⁻ = 2Na⁺ + NO₃⁻ + H₂O + CO₂
CO₃²⁻ + 2H⁺ = H₂O + CO₂
2. CuSO₄ + 2NaOH = Cu(OH)₂↓ + Na₂SO₄
Cu²⁺ + SO₄²⁻ + 2Na⁺ + 2OH⁻ = Cu(OH)₂↓ + 2Na⁺ + SO₄²⁻
Cu²⁺ + 2OH⁻ = Cu(OH)₂↓
3. ZnCl₂ + 2NaOH = Zn(OH)₂↓ + 2NaCl
Zn²⁺ + 2Cl⁻ + 2Na⁺ + 2OH⁻ = Zn(OH)₂↓ + 2Na⁺ + 2Cl⁻
Zn²⁺ + 2OH⁻ = Zn(OH)₂↓
Объяснение:
1. Na₂CO₃ + 2HNO₃ = 2NaNO₃ + H₂O + CO₂
2Na⁺ + CO₃²⁻ + 2H⁺ + 2NO₃⁻ = 2Na⁺ + NO₃⁻ + H₂O + CO₂
CO₃²⁻ + 2H⁺ = H₂O + CO₂
2. CuSO₄ + 2NaOH = Cu(OH)₂↓ + Na₂SO₄
Cu²⁺ + SO₄²⁻ + 2Na⁺ + 2OH⁻ = Cu(OH)₂↓ + 2Na⁺ + SO₄²⁻
Cu²⁺ + 2OH⁻ = Cu(OH)₂↓
3. ZnCl₂ + 2NaOH = Zn(OH)₂↓ + 2NaCl
Zn²⁺ + 2Cl⁻ + 2Na⁺ + 2OH⁻ = Zn(OH)₂↓ + 2Na⁺ + 2Cl⁻
Zn²⁺ + 2OH⁻ = Zn(OH)₂↓