|__ Na + __ O 2−|
|Ratio formula||Na 2 O|
|External identifiers / databases|
|Molar mass||61.98 g mol −1|
2.27 g cm −3
decomposes in water
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
It can be obtained directly from the elements. In this case, however, it is necessary to observe the stoichiometry of the reaction and the temperature, since otherwise sodium peroxide and sodium hyperoxide are also formed if there is an excess of oxygen .
The reaction is carried out in a temperature range of 150-200 ° C. Higher temperatures encourage the formation of sodium peroxide.
Another possibility is the reaction of liquid sodium with sodium nitrate .
Pure sodium oxide can be obtained by reacting sodium azide with sodium nitrate.
The reaction of sodium hydroxide and sodium is also possible.
The standard enthalpy of formation of sodium oxide is ΔH f 0 = −418 kJ / mol.
- Entry on sodium oxides. In: Römpp Online . Georg Thieme Verlag, accessed on September 29, 2014.
- Data sheet Sodium oxide, 80% from Sigma-Aldrich , accessed on February 1, 2019 ( PDF ).
- A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , pp. 1173-1176.
- Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 951.