Question

According to which theory/theories ammonia is a base?

• A. Arrhenius, Bronsted
• B. Bronsted , Lewis
• C. Arrhenius, Lewis
• D. Both $\left(B\right)$ and $\left(C\right)$

Answer 1

The correct option is B Bronsted , Lewis

The Arrhenius definition can be summarized as Arrhenius acids form hydrogen ions in aqueous solution with Arrhenius bases forming hydroxide ions. This theory can not explain basic nature of $N{H}_3$ . According to Bronsted theory a bases are defined as being able to accept protons.$N{H}_3$ accepts the proton to form $N{H}_4^{+}$ ion. Lewis base is an electron pair donor. In $F_{3}B-NH3$, $N{H}_3$ is a Lewis base because it gives a pair of electrons.