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 $F^{-}$

Answer 1

Answer: (C)

The fluoride ion, by a process of hydrogen bonding, forms the anion, $H{F}_2^{-}$. The compound is written as $K^{+}{\left[H{F}_2\right]}^{-}$.