# Is the following acid-base reaction Arrhenius, Bronsted-Lowry, or Lewis: Ag+ + 2 NH3 --> Ag(NH3)2+

According to the definition, a Lewis base is a substance that donates electrons and a Lewis acid is a substance that accepts electrons. In this case, the metal cation ($A {g}^{+}$) will act as a Lewis acid by accepting $N {H}_{3}$'s lone pair of electrons, thus making $N {H}_{3}$ a Lewis base. Metal cations have two features that make them good Lewis acids: