Preparation
Boric acid may be prepared by reacting borax (sodium tetraborate decahydrate) with a mineral acid, such as hydrochloric acid:
- Na2B4O7ยท10H2O + 2 HCl โ 4 B(OH)3 + 2 NaCl + 5 H2O
It is also formed as a by product of hydrolysis of boron trihalides and diborane:
- B2H6 + 6 H2O โ 2 B(OH)3 + 6 H2
- BX3 + 3 H2O โ B(OH)3 + 3 HX (X = Cl, Br, I)
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