P2O5->Ca(H2PO4)2->Ca3(PO4)2

Question

P2O5->Ca(H2PO4)2->Ca3(PO4)2

Answer 1

1) 2CaHPO4 + P2O5 + 3H2O = 2Ca(H2PO4)2

2) 3Ca(H2PO4)2 = Ca3(PO4)2 (ОСАДОК) + 4H3PO4  (КИПЯЧЕНИЕ)