Write the reaction equations: phosphorus phosphorus (V) oxide phosphoric acid potassium phosphate calcium phosphate phosphorus
To carry out the above chain of transformations, we need to carry out two reactions.
Phosphorus react with oxygen. As a result of the reaction, pentavalent phosphorus oxide is formed. The chemical equation for the reaction is as follows.
4 P + 5 O2 = 2 P2O5
Pentavalent phosphorus oxide react with water, as a result of the reaction orthophosphoric acid is formed. The chemical equation for the reaction is as follows.
P2O5 + 3 H2O = 2 H3PO4
Phosphoric acid react with sodium hydroxide. As a result of the reaction, sodium phosphate is formed and water is released.
H3PO4 +3 NaOH = Na3PO4 + 3 H2O
The reaction of sodium phosphate and potassium chloride, as a result of the reaction, calcium phosphate is formed, which precipitates, and sodium chloride is also formed.
2 Na3PO4 + 3 CaCl2 = Ca3 (PO4) 2 + 6 NaCl
Calcium phosphate react with sulfuric acid. As a result of the reaction, phosphoric acid and calcium sulfate are formed, which precipitate ..
Ca3 (PO4) 2 + 3 H2SO4 = 2 H3PO4 + 3 CaSO4.