Объяснение:
1) Ca + H₂ = CaH₂
2) CaH₂ + 2H₂O = Ca(OH)₂ + 2H₂ ↑
3) Ca(OH)₂ + К₂CO₃ = 2КOH + CaCO₃
4) CaCO₃ + 2HCl = CaCl₂ + H₂O + CO₂ ↑
5) CaH₂ + O₂ = CaO + H₂O
6) Ca(OH)₂ = CaO + H₂O
7) 3CaCl₂ + 2Na₃PO₄ = Ca₃(PO₄)₂↓ + 6NaCl
3Ca²⁺ + 6Cl⁻ + 6Na⁺ + 2PO₄³⁻ = Ca₃(PO₄)₂↓ + 6Na⁺ + 6Cl⁻
3Ca²⁺ + 2PO₄³⁻ = Ca₃(PO₄)₂↓
Объяснение:
1) Ca + H₂ = CaH₂
2) CaH₂ + 2H₂O = Ca(OH)₂ + 2H₂ ↑
3) Ca(OH)₂ + К₂CO₃ = 2КOH + CaCO₃
4) CaCO₃ + 2HCl = CaCl₂ + H₂O + CO₂ ↑
5) CaH₂ + O₂ = CaO + H₂O
6) Ca(OH)₂ = CaO + H₂O
7) 3CaCl₂ + 2Na₃PO₄ = Ca₃(PO₄)₂↓ + 6NaCl
3Ca²⁺ + 6Cl⁻ + 6Na⁺ + 2PO₄³⁻ = Ca₃(PO₄)₂↓ + 6Na⁺ + 6Cl⁻
3Ca²⁺ + 2PO₄³⁻ = Ca₃(PO₄)₂↓