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svetka1574

P -> P2O5 -> H3PO4 -> Na3PO4 -> Ca3(PO4)2

4P +5 O2 =2 P2O5

P2O5  + 3H2O =2H3PO4

H3PO4 + 3NaOH = Na3PO4 + 3H2O

2Na3PO4 + 3CaCl2 = Ca3(PO4)2 +6 NaCl

из P2O5 можно получить Na3PO4

 P2O5 +3 Na2O =2 Na3PO4

из Н3РО4 можно получить Са3(РО4)2

2H3PO4 + 3CaO = Ca3(PO4)2 + 3H2O

Из Р2О5 можно получить Са3(РО4)2

Р2О5 + 3СаО = Са3(РО4)2

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