Sodium hydroxide is a well-known strong base (an alkali). It is corrosive (yes, not only acids are corrosive) and is commonly involved in chemical reactions.
Below are a few ways to make sodium hydroxide:
Sodium metal + Water → Sodium hydroxide + Hydrogen gas
2 Na (s) + 2 H2O (l) → 2 NaOH (aq) + H2 (g)
Sodium ethoxide + Water → Sodium hydroxide + Ethanol
NaC2H5O (s) + H2O (l) → NaOH (aq) + C2H5OH (l)
Sodium metal + Lithium hydroxide → Sodium hydroxide + Lithium
Na + LiOH → NaOH + Li
These methods work quite well, but be careful: Sodium metal is highly reactive and will react violently and with so much heat that the hydrogen gas given off (during the first reaction) might ignite. In the second reaction, sodium ethoxide and water react violently. For the third reaction, the by-product, lithium metal will also, quickly and violently, react with excess water. So you might end up with a mixture of lithium hydroxide and sodium hydroxide.
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