SODIUM OXIDE Na2O

Properties of Sodium oxide Na2O:

White, heat-resistant, refractory. Shows strong basic properties, reacts vigorously with water (forms an alkaline solution), acids, acidic and amphoteric oxides, liquid ammonia.


Molar mass g/mol 61.98
Density g/cm3 2.36
Melting point °C 1132

Obtaining sodium oxide:

2 Na + 2 NaOH = 2 Na2O + H2 (600°C).

2 Na + O2 (air) = Na2O2 (burning, impurity Na2O)

2 Na + O2 = Na2O2 (250-400°C).

2 Na2O2 = 2 Na2O + O2 (400-675°C, vacuum).

Na2O2H + 2Na = 2 Na2O (130-200°C, in the atmosphere of Аrgon).

2 NaOH + 2Na = 2 Na2O + H2 (600°C).

Na2CO3 = Na2O + CO2 (t>1000°C).

5 NaN3 + NaNO3 = 8N2 + 3Na2O (350-400°C, vacuum).

2 NaNO2 + 6 Na = 4 Na2O +N2 (350-400°C).


Reactions with sodium oxide:

2 Na2O = Na2O2 + 2Na (t>700°C).

Na2O + H2O = 2NaOH.

Na2O + 2HCl (diluted) = 2NaCl + H2O.

Na2O + CO2 = Na2CO3 (450-550°C).

Na2O + NO + NO2 = 2 NaNO2 (250°C).

Na2O + Al2O3 = 2 NaAlO2 (1200°C).

2 Na2O + O2 = 2 Na2O2 (250-350°C, pressure).

Na2O + NH3 (liquid) → time → NaNH2 + NaOH (- 50°C).


 

Did you know?

Most of the air is about 78% nitrogen gas. Only 21% consists of oxygen. The remaining 1% consists of carbon dioxide, argon, neon, helium, krypton, hydrogen, xenon and ozone.