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When BCl(3) is treated with water, it hy...

When `BCl_(3)` is treated with water, it hydrolyses and forms `[B[OH]_(4)]^(-)` only whereas `AlCl_(3)` in acidified aqueous solution forms `[Al[H_(2)O]_(6)]^(3+)` ion. Explain what is the hybridisation of boron and aluminium in these species ?

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