Chemical Forums
Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: annazbylut on March 12, 2008, 11:49:31 AM
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Product from reaction Na + O2 is Na2O2 or Na2O. It depend on temperature, preesure or something else?
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Here's a quick cut n' paste from Wikipedia:
Na2O forms when sodium is treated with oxygen.
4 Na + O2 → 2 Na2O
Burning sodium in air will produce Na2O and about 20% sodium peroxide Na2O2.
6 Na + 2 O2 → 2 Na2O + Na2O2
Pure Na2O can be prepared by reaction of liquid sodium with NaNO3.
10 Na + 2 NaNO3 → 6 Na2O + N2
In the case of burning sodium in air, what you'll get isn't rigidly defined by reaction conditions, as I recall, perhaps it's an equilibrium between Na2O and Na2O2 ?
*[EDIT]*
Dang subscripts.
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Na2O forms when sodium is treated with oxygen.
4 Na + O2 → 2 Na2O
Which is in obvious contradiction with "burning in air gives mixture". Peroxide article states "Sodium peroxide can be synthesized by direct reaction with sodium and oxygen at 130 - 200 °C."
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But this range of temperature is difficult to keep during burning. Usually temperature without control is above 1000 C