Which equilibrium can be described as an acid | vedclass

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(D) The Bronsted-Lowry definition defines acids as proton $(H^+)$ donors and bases as proton acceptors.In options $A$,$B$,and $C$,there is a clear tra

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$[Cu(H_2O)_4]^{2+} + 4NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$

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(D) The Bronsted-Lowry definition defines acids as proton $(H^+)$ donors and bases as proton acceptors.In options $A$,$B$,and $C$,there is a clear transfer of a proton $(H^+)$ from the acid to the base.In the reaction $[Cu(H_2O)_4]^{2+} + 4NH_3 \rightleftharpoons [Cu(NH_3)_4]^{2+} + 4H_2O$,there is no proton transfer.Instead,$NH_3$ acts as a Lewis base by donating a lone pair of electrons to the $Cu^{2+}$ ion (Lewis acid) to form a coordinate covalent bond.Therefore,this reaction is an acid-base reaction according to the Lewis definition but not the Bronsted-Lowry definition.

Which equilibrium can be described as an acid-base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition?

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