titrations, solubility - rest of ch 17 and ch 19

[Robert Zellmer]

We got through much of section 17.3 (titrations) last Thur.  That was kind
of the "end" on acid-base chemistry (but you will use some of this
knowledge in the rest of the chapter and later in future chapters).

Understanding acids, bases, buffers and acid-base titrations is important,
not just for our class but organic chemistry and biology related classes.
This is why I spent essentially the last 2 lectures on sections 17.1 
(common
ion equilibria), 17.2 (buffers) & 17.3 (titrations) and will finish up the
titrations stuff Thursday.

Titrations pretty much combine much of what we covered in chapter 16
and sections 17.1-17.2 in one problem.   This material was on midterm 2
so hopefully you understand them.  If not, look back over them and
strong acid - strong base titrations.

I also did a problem dealing with the reaction of a weak acid with a weak
base and getting the equil. constant for such a rxn. There are homework
problems covering this in ch 16 (16.105 & 16.126).  This is just an 
application
of adding equations together to get another eqn and then multiplying the
K's.

We'll start section 17.4  Thur. (start of solubility equilibria of 
slightly to
insoluble salts).  I plan to finish ch 17 by next Tue.  We may even 
start Ch 19
next Tue.   We will certainly be in ch 19 next week at some point. If 
you look
at my ch 19 notes the first few pages are a review of some things from ch 5.
You really need to review ch 5 before we start ch 19.  We'll be doing some
things in ch 19 which are similar to some things you did in ch 5. Look 
at the
first 17 pages of the notes which review ch 5 material.  If you have trouble
understanding what's there you may have to review the ch 5 material in the
book.  I'm not sure if I will cover these pages in lecture or not but if 
I do I'll be
going through this review material pretty quickly.

Dr. Zellmer