1. 4P + 5O₂ → 2P₂O₅
2. P₂O₅ + 3H₂O → 2H₃PO₄
3. 2H₃PO₄ + 3Mg → Mg₃(PO₄)₂ + 3H₂
4. Mg₃(PO₄)₂ + 3Ca → 3Mg + Ca₃(PO4)₂
5. 2Mg + O₂ → 2MgO
6. MgO + H₂O → Mg(OH)₂
7. 3Mg(OH)₂ + 2H₃PO₄ → Mg₃(PO₄)₂ + 6H₂O
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Answers & Comments
1. 4P + 5O₂ → 2P₂O₅
2. P₂O₅ + 3H₂O → 2H₃PO₄
3. 2H₃PO₄ + 3Mg → Mg₃(PO₄)₂ + 3H₂
4. Mg₃(PO₄)₂ + 3Ca → 3Mg + Ca₃(PO4)₂
5. 2Mg + O₂ → 2MgO
6. MgO + H₂O → Mg(OH)₂
7. 3Mg(OH)₂ + 2H₃PO₄ → Mg₃(PO₄)₂ + 6H₂O