ABC26IN0017 · Acids and Bases

Subject: Inorganic Chemistry · Chapter: Acids and Bases · Topic: Acid and Bases – General · Exam: CSIR-NET DEC 2019 · Marks: 2 · Difficulty: Medium

Among $\mathrm{SO_2(OH)F}$, $\mathrm{CH_3CO_2H}$, LiF and $\mathrm{H_2O}$, the compound(s) which behave(s) as a base in liquid HF is/are
(a)$\mathrm{CH_3CO_2H}$ and LiF only
(b)LiF only
(c)$\mathrm{SO_2(OH)F}$ and LiF only
(d)$\mathrm{CH_3CO_2H}$, LiF and $\mathrm{H_2O}$
Answer
SELF-PRACTICE — the source book printed no answer.

Nothing is invented here, so this question has no answer on record.

Explanation
\[ \mathrm{HOSO_2F + HF \rightarrow [H_2F]^{+} + [SO_3F]^{-}} \quad \text{Acid} \]
\[ \mathrm{CH_3CO_2H + 2HF \rightarrow [CH_3C(OH)_2]^{+} + [HF_2]^{-}} \quad \text{Base} \]
\[ \mathrm{LiF + HF \rightarrow Li^{+}[HF_2]^{-}} \quad \text{(Base)} \]
\[ \mathrm{H_2O + HF \rightarrow H_3O^{+} + F^{-}} \quad \text{(base)} \]

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