7. For the strong acid-weak base titration of ammonia by hydrochloric acid, find the pH after 15.0 mL of 0.100 M HCl has been added to 25.0 mL of 0.100 M NH3 solution. (Kb = 1.8 x 10-5)

Challenge: Using the principles outlined in Section 14: Titration Curves, calculate the pH and enter it below. If you do not feel comfortable with pH calculation, or answer the question incorrectly, attempt the question and then follow the guided solution through questions 8 through 17. The guided solution is most beneficial for those who have attempted the question without guidance.

The pH is: