Which equilibrium can be described as an acid - base reaction using the Lewis acid-base definition, but not using Bronsted - Lowry definition ?
1
\(\rm NH_3 + CH_3COOH \rightleftharpoons CH_3COO^– + NH_4^+\)
2
H2O + CH3COOH \(\rightleftharpoons\) H3O+ + CH3COO–
3
4NH3 + [Cu(H2O)4]2+ \(\rightleftharpoons\) [Cu (NH3)4]2+ + 4H2O
4
\(\rm 2NH_3 + H_2SO_4 \rightleftharpoons 2NH_4^+ + SO_4^{2– }\)
5
Question Not Attempted