Question

P→p2o5→h3po4→na3po4→ca(po4)2

Answer 1

4P + 5O2 = 2P2O5

P2O5 + 3H2O = 2H3PO4

2H3PO4 + 6Na = 2Na3PO4 + 3H2

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

Answer 2

The sequence of chemical reactions shown in the statement describes the conversion of elemental phosphorus (P) to calcium phosphate (Ca3(PO4)2) via several intermediate steps.

The first step involves the reaction of elemental phosphorus (P) with oxygen (O2) to form phosphorus pentoxide (P2O5):

2 P + 5 O2 → 2 P2O5

In the second step, phosphorus pentoxide (P2O5) reacts with water (H2O) to form phosphoric acid (H3PO4):

P2O5 + 3 H2O → 2 H3PO4

The third step involves the neutralization of phosphoric acid (H3PO4) with sodium hydroxide (NaOH) to form sodium phosphate (Na3PO4):

H3PO4 + 3 NaOH → Na3PO4 + 3 H2O

Finally, in the last step, calcium chloride (CaCl2) reacts with sodium phosphate (Na3PO4) to form calcium phosphate (Ca3(PO4)2):

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

Overall, the sequence of reactions can be summarized as follows:

P + 5 O2 + 6 NaOH + 3 CaCl2 + 6 H2O → Ca3(PO4)2 + 6 NaCl