What happens to the pH of Ammonia when an acid is added to it? What is the chemical reaction that occurs?

Answer 1

It becomes less basic (alkaline) because of the addition of H+

NH3 + H+ -----> NH4+ (ammonium)

Answer 2

The pH of the solution will decline as the acid (pH less than 7)neutralizes the ammonia (pH more than 7), which is a base. The process, is sometimes called neutralization.

Answer 3

The pH decreases. The process is called neutralization and can be represented as
OH + H --> H2O