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How will you convert, boric acid into (i...

How will you convert, boric acid into (i) Boron trifluoride (ii) Borax

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(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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