Question

$KF$ combines with $HF$ to form $KHF_2$. The compound contains the species:

• A. $K^+, F^+$ and $H^+$
• B. $K^+, F^-$ and $HF$
• C. $K^+$ and $[HF_2]^-$
• D. $[KHF]^+$ and $F_2$

Answer 1

Answer: (C)

$K^+$ and $[HF_2]^-$

Answer 2

The reaction is:
$KF + HF \rightarrow KHF _{2}$
It is formed due to $H$-bond. $K ^{+} F ^{-}---- H - F$ (-- is $H$-bond)
So, the compound contains $K ^{+}$and $\left[ HF _{2}\right]^{-}$ions.