[CHM 115] Final Exam

[Andrew J. Pounds]

On 12/11/13 15:43,
> Dr. Pounds,
> Good afternoon. I had a couple questions regarding the final exam. 
> What should we be focusing on: topics covered in tests, lectures, 
> labs or will it just be a general combination of those?

Yes.

This test will be approximately 40% multiple choice and 60% problems.  
Some of the multiple choice may require you to do short calculations.


>  I was also wondering what the explanation behind number 10 part c on 
> exam 5 was.  I got different answers for it and we both got it wrong, 
> I’m assuming the answer is that the pH decreases.

So on this problem you had a precipitate of Ca(OH)_2 with Ca2+ and OH- 
in solution.   When you added the metal ion it complexed with the OH in 
solution, drew it all out, and even drew up the precipitate (as 
indicated in the problem).  Therefore the OH- concentration went down 
and the pH decreased.


-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

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