AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

# calculating pH

3 posts / 0 new
Offline
Joined: Jan 2007
calculating pH

So I don't know how to calculate the pH after .010 mol gaseous HCl is added to 250.0 mL of a buffered solution of .050 M NH3/.15 M of NH4Cl.
Can someone explain how to do this?

"If electricity comes from electrons, does morality come from morons?"

Offline
Joined: Dec 2007

I would really love to answer that question, and I actually know how to now! But I just spent about 30 minutes writing it out on here to post for you and my computer randomly cleared it!!!! grrr...well, if you want some help PM me,K?

Maybe the point of life is just to live......
Forget that we cry
[LEFT][B][=Comic Sans MS][COLO

Offline
Joined: Jan 2007

If you still need help with this problem then the answer is:
First write this equation (NH3 + H+ ---> NH4) then under each reactant and product write the number or moles that are initially present. Next, assume H+ is the limiting reactant and subtract its moles from the reactant side and add it to the product side. Then recalulate the molarity of NH3 and NH4. After that use this equation (NH3 + H2O ----> NH4 + OH-) and write in the molarity and solve for the pH using the ICE chart or the Henderson-Hasselbalch equation.

Philman G.:cool:

## Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

## Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!