• # question_answer 15) Describe the shapes of $B{{F}_{3}}$and ${{[B{{F}_{4}}]}^{-}}$. Assign the hybridization of boron in these species.

In$B{{F}_{3}}$, boron is$s{{p}^{2}}-hybridized$, therefore, it has a planar shape. On the other hand, in ${{[B{{F}_{4}}]}^{-}}$ the boron is $s{{p}^{3}}-hybridized$and hence, $BF_{4}^{-}$ has a tetrahedral shape. Planar $(s{{p}^{2}}-hybridized)$ Tetrahedral $(s{{p}^{3}}-hybridized)$