Question

Which is the coordinating solvent in the following reaction?
$B{F}_3+HF+H_{2}O⟶H_3{O}^{+}+B{F}_4^{-}$

• A. $HF$
• B. $H_{2}O$
• C. $N{H}_3$
• D. $B{F}_3$

Answer 1

Answer: (A)

$HF$ act as a co-ordinating solvent. It loses proton and $F^{-}$forms co-ordinate bond with $B{F}_3$.