1) 4P + 5O₂ = 2P₂O₅
X1 - P₂O₅
2) P₂O₅ + 3H₂O = 2H₃PO₄
X2 - H₃PO₄
3) 2H₃PO₄ + 3Ca(OH)₂ = Ca₃(PO₄)₂ + 6H₂O
X3 -Ca₃(PO₄)₂
4) Ca₃(PO₄)₂ + 5C + 3SiO₂ → 3CaSiO₃ + 5CO + 2P
X4 - C и SiO₂
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Answers & Comments
1) 4P + 5O₂ = 2P₂O₅
X1 - P₂O₅
2) P₂O₅ + 3H₂O = 2H₃PO₄
X2 - H₃PO₄
3) 2H₃PO₄ + 3Ca(OH)₂ = Ca₃(PO₄)₂ + 6H₂O
X3 -Ca₃(PO₄)₂
4) Ca₃(PO₄)₂ + 5C + 3SiO₂ → 3CaSiO₃ + 5CO + 2P
X4 - C и SiO₂