Boric Acid and Borax



At high temperatures boron combines with oxygen to form boric oxide. So here we see boron combining with oxygen to form boric oxide. But boric oxide is not the end goal, it’s not what we’re trying to get. And so the boric oxide combines with water to form boric acid, which we have right there, so that is what we’re trying to get. Boric acid is a weak acid, so it’s used as an eye wash, but when it’s heated, boric acid loses water to form tetra boric acid, so we see the tetra boric acid here that forms, and that’s the anhydrous form of borax. So see generally borax looks like that, and see the multiplication symbol instead of an addition symbol, so this is basically a ratio meaning there’s 10 moles of H2O or 10 moles of water for every 1 mole of borax. But up here we just see water being added to it, so the borax is without water, so it’s the anhydrous form of borax, so you can see how boric acid can be used to form the anhydrous form of borax. Borax is found in lake deposits in California and is used in laundry and cleaning products. Now earlier we talked about how boric acid was made and it had nothing to do with borax. But generally most often boric acid is made from acidifying borax that is mined from lake deposits, so generally it is made from borax. So we see the borax right here and so this is not the anhydrous form so notice we do have water, and so that’s acidified right there. And it forms boric acid right there, which is something else we were trying to get, and so that’s the production process of boric acid and borax.

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Last updated: 07/25/2017
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