Watch this video to see my improved process for making sodium: http://www.youtube.com/watch?v=faorfmRkCv0&feature=response_watch
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This is one way sodium metal can be synthesized using NaOH and Mg. Mg, being a more reactive chemical than sodium at high temperature with oxygen, breaks down the NaOH, leaving ingots of elemental sodium within the ash.
2Mg + 2NaOH = 2MgO + 2Na + H2
Thanks to NurdRage for the equation.