-
Definition of Na4P2O5
Na4P2O5, also known as tetrasodium pyrophosphate or tetrasodium diphosphate, is a chemical compound composed of sodium, phosphorus, and oxygen. In its chemical formula, Na4P2O5, there are 4 atoms of sodium, 2 atoms of phosphorus, and 5 atoms of oxygen. These atoms are combined to form a molecule of Na4P2O5. This compound has a molecular weight of 265.9 g/mol. It consists of ionic structure made up of 4 sodium ions (Na+) and one pyrophosphate ion (P2O74-). -
Properties: Na4P2O5
2.1 Physical properties: Na4P2O5 is a white, odorless solid with a pH of about 10 when dissolved in water.
2.2 Chemical properties: Na4P2O5 can act as a complexing agent, capable of reacting with metal ions to form complex compounds. -
Common chemical equation:
Na4P2O5 is often used in the preparation of phosphorus compounds. For example, it can react with hydrochloric acid to produce H3PO4:
Na4P2O5 + 7HCl -> 2H3PO4 + 4NaCl
- Preparation of Na4P2O5
4.1 Laboratory preparation: Na4P2O5 is usually prepared through the reaction between sodium phosphate and sodium hydroxide:
Na3PO4 + NaOH -> Na4P2O5 + H2O
4.2 Industrial preparation: In industry, Na4P2O5 is typically produced through the reaction of sodium bicarbonate with tetraphosphorus decoxide:
10 NaHCO3 + P4O10 -> 4Na4P2O5 + 10CO2 + 5H2O