getting caught up

[robert zellmer]

As I explained on Friday, after hearing about quiz 3, many
people still need to get a better understanding of chapter 16,
particularly hydrolysis (salt solutions).  I finished section
17.3.  I know not everyone will need to do this but I would
suggest over the next few days going back and starting at
section 16.6 (weak acids) and working up through 17.3.
If you don't understand weak acids and bases and salt solutions
you will have trouble with common-ion problems.  If you don't
understand common-ion problems you won't understand
buffers (special type of CI problem).  Titrations in 17.3 put
all of this information together.  If you don't understand CI
problems much of the remaining chapter won't make sense.

So 16.6-17.3 is 9 sections to cover between now and Wed.
That's about 3 sections per day over the next 3 days (16.8 is
very short), assuming you haven't already done some of it.
That doesn't seem too bad when you think  about it.

In terms of homework problems for sections 17.1-17.3 you
should be able to do all of the ones which cover those
sections plus the Additional Exercises, 17.83-17.97 and
Integrative Exercises 17.110-17.114.  Next weeks quiz
will definitely cover 17.1-17.3.  I'll put the material for the
quiz up through this much at the Quiz link.  I'm not sure
yet if it will cover anything from next Wed.  If it does it
would be only 17.4.

Remember, starting next Tuesday the next three lab periods
involve acid-base problems of some sort, salt solutions followed
by two titration labs.  Understanding this material will really
help, even with the lab practical.

Dr. Zellmer