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Question 14.2: IDENTIFYING BRØNSTED–LOWRY ACIDS, BASES, AND CONJUGATE ACID–...

IDENTIFYING BRØNSTED–LOWRY ACIDS, BASES, AND CONJUGATE ACID–BASE PAIRS

For the following reaction in aqueous solution, identify the Brønsted–Lowry acids, bases, and conjugate acid–base pairs:

STRATEGY
The simplest approach is to identify the conjugate acid–base pairs, the species whose formulas differ by just one proton.

hs
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The second reactant is HF, and the first product is its conjugate base F^{-}. The second product is H_{2}S, and the first reactant is its conjugate base HS^{-}. Therefore, the Brønsted–Lowry acids, bases, and conjugate acid–base pairs are as follows:

\underbrace{\underset{Base}HS^{-}(aq)  +  \underbrace{\underset{Acid}{HF(aq)}  \rightleftharpoons  \underset{Base}{F^{-}(aq)} }_{Conjugate  acid–base  pairs}  +  \underset{Acid}{H_{2}S(aq)}} _{}

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