Preparation of Boric Acid 1) From Borax Boric acid is obtained by treating a hot concentrated solution of borax with hydrochloric acid or sulphuric acid. The resulting solution on concentration and cooling gives crystals of boric acid. Na2B4O7 + 2 HCl + 5 H2O → 4 H3BO3 + 2 NaCl Na2B4O7 + H2SO4 + 5 H2O → 4 H3BO3 + 2 Na2SO4 2) By hydrolysis of boron compounds Boric acid … [Read more...] about Boric Acid