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How will you convert, boric acid into, (i) Boron trifluoride (ii) Borax |
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Answer» Solution :(i) Boron TRIFLUORIDE: BORIC acid REACTS with calcium fluoride in presence of conc. Sulphuric acid and gives boron trifluoride. `underset(("Boric acid"))(2B(OH)_(3))+CaF_(2)+3H_(2)SO_(4)to 3CaSO_(4)+underset(("Boron trifluoride"))(2BF_(3))+6H_(2)O` (ii) Borax: Boric acid, when heated with soda ash it gives borax. `Na_(2)CO_(3)+underset(("Boric acid"))(4B(OH)_(3))overset(Delta)(to) underset(("Borax"))(Na_(2)B_(4)O_(7))+CO_(2)+6H_(2)O` |
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