NH3–NH4Cl is a/an Buffer that helps regulate the pH of a system.
A buffer solution ( pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its salt formed from conjugate base, or weak base and its salt formed from conjugate acid.
Acidic Buffer : Consisting of a mixture of a weak acid and its salt formed from conjugate base.
Basic Buffer : Consisting of a mixture of a weak base and its salt formed from conjugate acid.
The given solution is NH3-NH4Cl is Basic buffer which is composed of weak base(NH3 ammonia) and a salt(NH4Cl ammonium chloride) formed from its conjugate acid(HCl hydrochloric acid).
[tex]NH_{3}(Weak base) + HCl(Conjuagte acid)\rightarrow NH_{4}Cl(Salt)[/tex]
[tex]NH_{3}-NH_{4}Cl [/tex]composed of weak base and its salt and is considered as Basic Buffer.
