Bromine trifluoride autoionizes to form ${BrF}_{2}^{\oplus}$ and ${BrF}_{4}^{\ominus}$. The shapes o

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Bromine trifluoride autoionizes to form ${BrF}_{2}^{\oplus}$ and ${BrF}_{4}^{\ominus}$. The shapes of the cation and anion are respectively $\_\_\_\_$ , and $\_\_\_\_$ .

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Sol. [Key Concept: ${BrF}_{2}^{+}$ is ${sp}^{3}$ (2 bond pairs, 2 lone pairs) so bent, while ${BrF}_{4}^{-}$ is ${sp}^{3}d^{2}$ (4 bond pairs, 2 lone pairs) so square planar.]$$\ {BrF}_{2}^{\oplus} \Rightarrow {sp}^{3} $$[Bond pair =2, lone pair =2]⇒ bent$${BrF}_{2}^{\oplus} \Rightarrow {sp}^{3}{	ext{ }d}^{2} $$[Bond pair =4, lone pair =2]⇒ square planar

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