Ammonium chloride, nh4cl, is a salt formed from the neutralization of the weak base ammonia, nh3, with the strong acid hydrochloric acid. given that the value of kb for ammonia is 1.8×10−5, what is the ph of a 0.176 m solution of ammonium chloride at 25∘c?

The pH of a 0.176 M solution of ammonium chloride is 4.9902.

Explanation:

Given:

Kb for ammonia = 1.8×10⁻⁵

Since ammonium ions are the conjugate acid of ammonia.

Thus, Ka for ammonium ions;

Ka = Kw/Kb = 10⁻¹⁴ / 1.8×10⁻⁵ = 5.5556×10⁻¹⁰

Given concentration of Ammonium chloride (C) = 0.176 M

Thus, for weak acids,

pH is:

pH = 4.9902

Thus,

The pH of a 0.176 M solution of ammonium chloride is 4.9902.

it would be a gas formation