Sodium oxide
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| Sodium oxide | |
|---|---|
| Image:Sodium oxide.jpg | |
| General | |
| Systematic name | Sodium Oxide |
| Other names | Sodium(I) Oxide, disodium oxide, sodium monoxide |
| Molecular formula | Na2O |
| Molar mass | 61.9789 g/mol |
| Appearance | White, amorphous powder. |
| CAS number | [1313-59-3] |
| Properties | |
| Density and phase | 2.270 g/cm3 |
| Solubility in water | Decomposes. |
| Melting point | 1132°C |
| Boiling point | Decomposes at 1950°C |
| Basicity (pKb) | N/A |
| Structure | |
| Coordination geometry | ? |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Corrosive (C) |
| R-phrases | R8, R14, R35 |
| S-phrases | S8, S27, S39, S43, S45 |
| NFPA 704 | |
| Flash point | Non-flammable |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references | |
Sodium oxide has formula Na2O. It is also called sodium(I) oxide, disodium oxide, sodium monoxide, and soda. It is used in ceramics as a glaze additive. It is also a constituent of glass at around 15% sodium oxide. The other percentage being silicon dioxide and calcium oxide at around 70% and 9% repectively. The soda serves as a flux to lower the temperature at which the silica melts.
Sodium oxide is a basic compound, thus on reaction with water it will create sodium hydroxide (NaOH).
- Na2O + H2O → 2NaOH
Sodium oxide has the formula weight of 61.979 u. It is formed when sodium is burned with limited oxygen to the following equation:
- 4Na + O2 → 2Na2O
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