Question

The $H{F}_2^{-}$ ion exists in the solid state and also in liquid HF solution but not in dilute aqueous solution because:

• A. $H_3{O}^{+}and{F}^{-}$ are much more likely to be formed in an aqueous solution
• B. HF is weaker acid than $H_{2}O$
• C. HF has H - bonding
• D. None of these

Answer 1

The correct option is A $H_3{O}^{+}and{F}^{-}$ are much more likely to be formed in an aqueous solution

In aqueous solutions, because there is more water, each HF molecule hydrogen bonds with the much more prevalent $H_{2}O$ present instead of other HF molecules. Thus, $H_3{O}^{+}and{F}^{-}$ are much more likely to be formed.