Question

The resulting pH of a solution when 100 mL of 0.877 M NH3 is mixed with 100 mL of 0.481 M HBr is ___. For NH3, Kb = 1.8 × 10−5.

Answer 1

See your other post. NH is the base. Remember to change Kb to pKa.

Answer 2

9.54 for this one?

Answer 3

Check your work. I found 9.52. I used 9.26 for pKa.
14-4.74 = 9.26