pH of solution with 0.1M ammonia and 0.141M ammonium chloride

[Ukitake Jyuushirou]

What is the pH of a solution 0.1 M in ammonia and 0.141 M in ammonium chloride? (Kb for ammonia is 1.8e-5)

i would really appreciate if someone can pt me in the right direction on how to solve this qn

 

[pizzasky]

It will help if you write out the equation for $$K_{b}$$.

Also, remember that ammonium chloride is soluble in water and dissociates completely, producing ammonium and chloride ions.

 

[Borek]

This is buffer question. You may use Henderson-Hasselbalch equation to solve it.