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Sodium oxide

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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 lime 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 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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