Ответ:
P -> P2O5 -> Na2HPO4 -> CaHPO4 -> H3PO4
1. 4P + 5O2 -> 2P2O5.
2. P2O5 + 4NaOH -> 2Na2HPO4 + H2O.
3. Na2HPO4 + CaCl2 -> 2NaCl + CaHPO4.
4. 3CaHPO4 -> H3PO4 + Ca3(PO4)2.
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Verified answer
Ответ:
P -> P2O5 -> Na2HPO4 -> CaHPO4 -> H3PO4
1. 4P + 5O2 -> 2P2O5.
2. P2O5 + 4NaOH -> 2Na2HPO4 + H2O.
3. Na2HPO4 + CaCl2 -> 2NaCl + CaHPO4.
4. 3CaHPO4 -> H3PO4 + Ca3(PO4)2.