CHM 112L Info Page

Dr. Krueger's web page for all things CHM 112-lecture related is here.

 

The main LAB information page (with spreadsheets, etc.) is here

 

The answer to the buffer problems from March 13-15:

 

1. a. pH = 9.00

b.  pH = 8.93

H3O+  +  NH3  - - ->  H2O  +  NH4+

 

 

2.  a. OH-  +  HOCl  - - ->  H2O  +  OCl-

b.  pH = 7.59 (if you didn’t get this number, you probably used the wrong volume to find moles of HOCl and NaOCl, see me)

c.  [HOCl] = 0.18 M, [OCl-] = 0.25 M

 

 

3.  a.  7.32 x 10-4 M     b.  6.28 x 10-7 M

 

 

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