Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Question Explanation: Identification of a proton located midway between two atoms.

Concept: Symmetrical Hydrogen Bonding.

Solution: In a symmetrical hydrogen bond, the hydrogen nucleus is placed exactly at the center between two identical electronegative atoms. The bifluoride ion ${\left[{\mathrm{HF}}_2\right]}^{-}$is the classic example where the H atom is equidistant from both F atoms.

Bond length F-H-F is linear; both H-F distances are equal at approx $1.14\mathring{A}$.

Final Answer: ${\left[{\mathrm{HF}}_2\right]}^{-}$ion