Question

According to one acid-base theory, NH3 acts as a base when an NH3 molecule

A) accepts an H+ion
B) donates an H+ ion
C) accepts an OH-ion
D) donates an OH- ion

Answer 1

According to the acid-base theory, base in a molecule that accepts a proton (H⁺ ion), while acid gives a proton (H⁺ ion).
Because NH₃ is a base it will accept H⁺ ion, as shown in the equation:
NH₃ + H⁺ → NH₄⁺

The correct answer is A) accepts an H⁺ ion.