What is Na3PO3? Important knowledge about Na3PO3.

1. Definition of Na₃PO₃

Na₃PO₃ is the chemical formula of sodium phosphite, also called sodium triphosphite. In English, it is called Sodium Phosphite. This salt consists of 3 sodium atoms, 1 phosphorus atom, and 3 oxygen atoms. The atomic mass of Na₃PO₃ is calculated by the total atomic mass of all atoms in the molecule, that is, 3 atomic masses of Na, 1 atomic mass of P, and 3 atomic masses of O.

1.4 The ion structure of Na₃PO₃ includes sodium ions (Na+) and phosphite ions (PO₃-3).

2. Properties of Na₃PO₃

2.1 Physical properties of Na₃PO₃: It is solid at room temperature, white, odorless, and has a neutral to slightly alkaline pH.

2.2 Chemical properties of Na₃PO₃: It has the ability to react with acids to form sodium phosphate and hydrogen gas.

3. Common chemical equations

Na₃PO₃ can react with metals such as Hg, Ag, Pb, Bi,… when heated to form PO and Na₂O. It can also react with acids like HCl, H₂SO₄, HNO₃ to form NaCl, Na₂SO₄, NaNO₃, and H₂ gas. With non-metals, Na₃PO₃ can react with Cl₂, Br₂, I₂, S, P,.. to form other complex compounds.

4. Preparation of Na₃PO₃

4.1 Laboratory synthesis: Na₃PO₃ can be synthesized from the reaction between NaOH and H₃PO₃.

NaOH + H₃PO₃ -> Na₃PO₃ + 3H₂O

4.2 Industrial synthesis: On an industrial scale, Na₃PO₃ is typically produced by heating Na₂HPO₄ with sodium at high temperatures.