Question

$KF$ combines with $HF$ to form $KH{F}_2$. The compound contains the species :

• A. $K^{+},F^{-}$ and $H^{+}$
• B. $K^{+},F^{-}$ and $HF$
• C. $K^{+}$ and $[H{F}_2{]}^{-}$
• D. $[KHF{]}^{+}$ and $F_2$

Answer 1

Answer: (C)

$K^{+}$ and $[H{F}_2{]}^{-}$

The reaction is:
$KF+HF\to KH{F}_2$
It is formed due to $H-$bond. $K^{+}{F}^{-}----H-F$ (-- is H-bond)
So, the compound contains $K^{+}$ and $[H{F}_2{]}^{-}$ ions.