Which cquilibrium can be described as Lcwis acid basc...

Which cquilibrium can be described as Lcwis acid basc reaction but not Bronsted acid basc reaction? (1) $\mathrm{H}_{2} \mathrm{O}+\mathrm{CH}_{3} \mathrm{COOH} \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{CH}_{3} \mathrm{COO}^{-}$ (2) $2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 2 \mathrm{NH}_{4}^{+}+\mathrm{SO}_{4}^{2-}$ (3) $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{NH}_{3} \rightarrow \mathrm{CH}_{3} \mathrm{COONH}_{4}$ (4) $\left[\mathrm{Cu}\left(\mathrm{II}_{2} \mathrm{O}\right)_{4}\right]^{21}+4 \mathrm{NII}_{3} \rightarrow\left[\mathrm{Cu}\left(\mathrm{NII}_{3}\right)_{4}\right]^{2}+4 \mathrm{II}_{2} \mathrm{O}$

Which cquilibrium can be described as Lcwis acid basc reaction but not Bronsted acid basc reaction?
(1) $\mathrm{H}_{2} \mathrm{O}+\mathrm{CH}_{3} \mathrm{COOH} \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{CH}_{3} \mathrm{COO}^{-}$
(2) $2 \mathrm{NH}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 2 \mathrm{NH}_{4}^{+}+\mathrm{SO}_{4}^{2-}$
(3) $\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{NH}_{3} \rightarrow \mathrm{CH}_{3} \mathrm{COONH}_{4}$
(4) $\left[\mathrm{Cu}\left(\mathrm{II}_{2} \mathrm{O}\right)_{4}\right]^{21}+4 \mathrm{NII}_{3} \rightarrow\left[\mathrm{Cu}\left(\mathrm{NII}_{3}\right)_{4}\right]^{2}+4 \mathrm{II}_{2} \mathrm{O}$

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Key Concepts

Lewis Acid and Base

This concept involves species that participate in chemical reactions through the donation and acceptance of electron pairs, rather than through the transfer of protons. A Lewis acid accepts an electron pair while a Lewis base donates an electron pair. This reaction definition is more general than the Bronsted acid-base concept and is applicable even when no protons are exchanged.

Bronsted Acid and Base

This concept defines acids as proton donors and bases as proton acceptors. In a Bronsted acid–base reaction, the focus is on the movement of hydrogen ions (H+). This type of reaction is distinguished from Lewis acid–base reactions since it specifically involves proton transfer.

Coordination Complex Formation

This is a type of reaction typically seen in inorganic chemistry, where a central metal ion (acting as a Lewis acid) accepts electron pairs from surrounding ligands (acting as Lewis bases) to form a complex. Such reactions often involve the formation of coordinate covalent bonds without the involvement of proton transfer, thus classifying them as Lewis acid–base interactions but not as Bronsted acid–base reactions.

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