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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
( R e d i r e c t e d f r o m N a 2 O )
Sodium oxide
Sodium oxide Sodium oxide
Names
IUPAC name
Sodium oxide
Other names
Soda
Sodium oxidosodium
Identifiers
CAS Number
3D model (JSmol )
ECHA InfoCard 100.013.827
EC Number
PubChem CID
UNII
UN number
1825
CompTox Dashboard (EPA )
Properties
Chemical formula
Na 2 O
Molar mass
−1
Appearance
white solid
Density
2.27 g/cm3
Melting point
1,132 °C (2,070 °F; 1,405 K )
Boiling point
1,950 °C (3,540 °F; 2,220 K ) sublimates
Sublimation
sublimates at 1275 °C
Solubility in water
Reacts to form NaOH
Solubility
Reacts with ethanol
Magnetic susceptibility (χ)
−19.8·10−6 cm 3
Structure
Crystal structure
Antifluorite (face centered cubic), cF12
Space group
Fm 3
Coordination geometry
Tetrahedral (Na + O 2−
Thermochemistry
Heat capacity (C
72.95 J/(mol·K)
Std molar (S ⦵ 298 )
73 J/(mol·K)[1]
Std enthalpy of (Δf H ⦵ 298 )
−416 kJ/mol[1]
Gibbs free energy (Δf G ⦵ )
−377.1 kJ/mol
Hazards
Occupational safety and health
Main hazards
corrosive, reacts violently with water
GHS labelling
Pictograms
[2]
Hazard statements
H314
Precautionary statements
P260 , P264 , P280 , P301+P330+P331 , P303+P361+P353 , P304+P340 , P305+P351+P338 , P310 , P321 , P363 , P405 , P501
NFPA 704
Flash point
nonflammable
Safety data sheet (SDS)
ICSC 1653
Related compounds
Other anions
Sodium selenide
Sodium telluride
Sodium polonide
Other cations
Potassium oxide
Rubidium oxide
Caesium oxide
Related sodium oxides
Sodium superoxide
Sodium ozonide
Related compounds
Sodium hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Sodium oxide is a chemical compound with the formula Na 2 O ceramics and glasses . It is a white solid but the compound is rarely encountered. Instead "sodium oxide" is used to describe components of various materials such as glasses and fertilizers which contain oxides that include sodium and other elements. Sodium oxide is a component.
Structure
[ edit ]
The structure of sodium oxide has been determined by X-ray crystallography . Most alkali metal oxides M 2 O Li Na K Rb antifluorite structure . In this motif the positions of the anions and cations are reversed relative to their positions in CaF2 sodium ions tetrahedrally coordinated to 4 oxide ions and oxide cubically coordinated to 8 sodium ions.[3] [4]
Preparation
[ edit ]
Sodium oxide is produced by the reaction of sodium with sodium hydroxide , sodium peroxide , or sodium nitrite :[5]
2 NaOH + 2 Na → 2 Na2 2
To the extent that NaOH is contaminated with water, correspondingly greater amounts of sodium are employed. Excess sodium is distilled from the crude product.[6]
A second method involves heating a mixture of sodium azide and sodium nitrate :[6]
5 NaN3 3 2 2
Burning sodium in air produces a mixture of Na 2 O sodium peroxide (Na 2 O 2
A third much less known method involves heating sodium metal with iron(III) oxide (rust):
6 Na + Fe2 O 3 2
the reaction should be done in an inert atmosphere to avoid the reaction of sodium with the air instead.
Applications
[ edit ]
Glassmaking
[ edit ]
Glasses are often described in terms of their sodium oxide content although they do not really contain Na 2 O Na 2 O sodium carbonate ), which loses carbon dioxide at high temperatures:
Na 2 CO 3 2 CO 2
Na 2 SiO2 → Na 2 3
Na 2 CO 3 2 2 3 2
A typical manufactured glass contains around 15% sodium oxide, 70% silica (silicon dioxide ), and 9% lime (calcium oxide ). The sodium carbonate "soda" serves as a flux to lower the temperature at which the silica mixture melts. Such soda-lime glass has a much lower melting temperature than pure silica and has slightly higher elasticity. These changes arise because the Na 2 2 x 3
Reactions
[ edit ]
Sodium oxide reacts readily and irreversibly with water to give sodium hydroxide :
Na 2 2
Because of this reaction, sodium oxide is sometimes referred to as the base anhydride of sodium hydroxide (more archaically, "anhydride of caustic soda").
References
[ edit ]
^ Zintl, E. ; Harder, A.; Dauth B. (1934). "Gitterstruktur der oxyde, sulfide, selenide und telluride des lithiums, natriums und kaliums". Zeitschrift für Elektrochemie und Angewandte Physikalische Chemie 40 8 ): 588–93. doi :10.1002/bbpc.19340400811 . S2CID 94213844 .
^ Wells, A. F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press ISBN 0-19-855370-6
^ Greenwood, Norman N. ; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann . ISBN 978-0-08-037941-8
^ a b E. Dönges (1963). "Sodium Oxide (IV )". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed . Vol. 1pages=975-6. NY, NY: Academic Press.
t
e
Inorganic
Halides
Chalcogenides
Pnictogenides
Oxyhalides
Oxychalcogenides
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Others
Organic
t
e
Mixed oxidation states
+1 oxidation state
+2 oxidation state
+3 oxidation state
+4 oxidation state
+5 oxidation state
+6 oxidation state
+7 oxidation state
+8 oxidation state
Related
Oxides are sorted by oxidation state .
Category:Oxides
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Sodium_oxide&oldid=1221493510 " C a t e g o r i e s : ● O x i d e s ● S o d i u m c o m p o u n d s ● F l u o r i t e c r y s t a l s t r u c t u r e H i d d e n c a t e g o r i e s : ● C S 1 : l o n g v o l u m e v a l u e ● C h e m i c a l p a g e s w i t h o u t C h e m S p i d e r I D ● A r t i c l e s w i t h o u t E B I s o u r c e ● A r t i c l e s w i t h o u t K E G G s o u r c e ● E C H A I n f o C a r d I D f r o m W i k i d a t a ● C h e m b o x h a v i n g G H S d a t a ● A r t i c l e s c o n t a i n i n g u n v e r i f i e d c h e m i c a l i n f o b o x e s ● C h e m b o x i m a g e s i z e s e t ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n m a t c h e s W i k i d a t a ● C o m m o n s c a t e g o r y l i n k i s o n W i k i d a t a
● T h i s p a g e w a s l a s t e d i t e d o n 3 0 A p r i l 2 0 2 4 , a t 0 7 : 5 1 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
[2]
