Chemistry Help?

Question

Calculate the pH of a 2.0 M solu-on of ammonia (NH3). (Kb = 1.8 × 10–5) 

 

Answer 1

Step 1:

The concentration of the [NH₃] is 2.0 M.

k_b for [NH₃] is .

The chemical equation is .

Let us consider change in the concentration:  , then .

Step 2:

Base ionization factor .

Concentration cannot be negative.

Concentration of .

Step 3:

Calculate pOH.

Calculate pH.

pH of the solution is 12.28.

Solution:

pH of the solution is 12.28.