Write the equations of chemical reactions: Phosphorus – phosphorus oxide 5 – phosphoric acid

Write the equations of chemical reactions: Phosphorus – phosphorus oxide 5 – phosphoric acid – calcium phosphate – sodium phosphate – orthophosphoric acid.

Let us write down the equations for the synthesis of inorganic phosphorus compounds:
4P + 5O2 = 2P2O5 – redox reaction (ORR), phosphorus oxide was obtained;
P – 5e = P5 + | 4 – reducing agent;
2O + 4e = 2O2- | 5 – oxidizing agent;
P2O5 + 3H2O = 2H3PO4 – compounds, phosphoric acid was formed;
2H3PO4 + 3Ca = Ca3 (PO4) 2 + 3H2 – OBP, calcium phosphate was obtained;
Ca – 2e = Ca2 + | 1 – reducing agent;
2H + + 2e = H2 | 1 – oxidizing agent;
Ca3 (PO4) 2 + 6NaOH = 2Na3PO4 + 3Ca (OH) 2 – ion exchange, sodium phosphate was obtained;
2Na3PO4 + 3H2SO4 = 3Na2SO4 + 2H3PO4 – ion exchange, orthophosphoric acid is formed.