I took the class 3 semesters ago and dropped the lab. Now im taking the lab and have forgotten some of the concepts. Im just wondering if anyone can offer any help. How would i go about doing these?

three questions

1) calculate the pH of 10.0 mL of 0.1 M HCl plus 5.0 mL of 0.1 M NaOH

2) calculate the pH of 10.0 mL of 0.1 M NH4Cl

3) calculate the pH of 10.0 mL of 0.1 M NaC2H3O2

10/15/2006 7:15:02 PM

I take it you don't have your chemisty book?

10/15/2006 8:45:27 PM

no i didnt buy it since i only have the lab

10/15/2006 9:49:36 PM

Best bet would be to contact a student in CH 201 as a regular study partner, and for supplemental info to seek out Dr. Warren (GreatGazoo / robert_warren@ncsu.edu), who's always got extra time for students. Right now you might have a few specific answers to get by, but it's going to catch up as the pre- and post-labs become more advanced.

10/16/2006 5:41:32 AM

http://en.wikipedia.org/wiki/PH

That page will tell you everything you need to know. Anymore help that that and you might as well get soneome to do it for you.

10/16/2006 12:25:28 PM

actually i've already looked at the wikipedia site and i still dont know how to do these. its easy to figure out the ones where its only HCl or only NaOH but these where there are weird compounds (NH4Cl & NaC2H3O2) i cant figure out what to do and also the first one has a base and an acid and im not sure how to factor those in b/c im sure they cancel eachother out to some extent

10/16/2006 6:19:22 PM

[Edited on October 18, 2006 at 1:25 AM. Reason : ]

10/18/2006 1:23:50 AM