4P + 5O₂ → 2P₂O₅
2P₂O₅ + 4NaOH → 2Na₂HPO₄ + H₂O
Na₂HPO₄ + CaCl₂ → CaHPO₄ + 2NaCl
3CaHPO₄ → H₃PO₄ + Ca₃(PO4)₂
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4P + 5O₂ → 2P₂O₅
2P₂O₅ + 4NaOH → 2Na₂HPO₄ + H₂O
Na₂HPO₄ + CaCl₂ → CaHPO₄ + 2NaCl
3CaHPO₄ → H₃PO₄ + Ca₃(PO4)₂