Acids and Bases Test Answers

June 4, 2007

Today in class, we went over the Acids and Bases Study Guide. If you weren't here today, the answers to the review is on the previous blog.

DONT FORGET THERE'S A TEST TOMORROW SO STUDY, STUDY, STUDY !!!

The next scribe is Jhun.

Ch.19 Acids and Bases Study Guide

June 1, 2007 Scribe

hello everyone...
Today in class Mrs. Kozoriz handed out a sheet, "Titration Graphs"
The answers are on the previous blog if you missed any of them.

Friday's class was pretty much a work period for those who needed to finish the lab and work on the acid and base study guide...

For those who missed friday's class..
FRIDAY WAS THE LAST DAY TO HAND IN THE LAB...


aaaannnnd do the review which we will be going over on monday....


DONT FORGET.....TEST ON TUESDAY!!!!!

kayyy is our next scribe

Titration Graphs

Wednesday, May 30, 2007

Today's class was comprised of a lab, "Determining the Percent of Acetic Acid in Vinegar." By determining the certain data from the two titrations, we'll figure out the percentage. I'm not too sure how right now, but probably tomorrow. Oh, don't forget to do the Pre-lab, I'm pretty sure we have to do it. For those who weren't present, the lab was quite easy. That's all i guess. (okay this isn't the "best" post, but I tried)
Jennie to scribe for Thursday

Monday, May 28, 2007

Monday: Finally Ms. K is here.
the topic for the day is about Acid and Base Dissociation Constant.
Acid Dissociation Constant:
- strong acids/base dissociate completely :. do not establish equilibrium
- if Ka > 1 = strong acid
- weak acids/base - establish equilibrium
- The equilibrium law: Ka= [H₃O⁺][A^-] / [HA]
-the Ka reflects the equilibrium that exists for as acid

Kb=[B⁺][OH^-] / [BOH]

-the larger the Ka/Kb, the stronger the acid/base.
-the smaller the Ka/Kb, the weaker the acid/base.

that's about it.

note: June 1, due date of research project

: )

Scribe Post.

Okay, today we went over the work sheet called Ionization Equations and Constants, that was given to us on Monday, the answers are as follows:

1.If they have more than one Hydrogen, there will be more ionization equations.
2.The Ka decreased as you go down the list
3.HCO₃^- is weaker because its Ka is smaller than H₂PO₄^-.
4. phosphorous <-> H⁺ + H₂PO₃^-, phosphorous - 1H <-> H + HPO₃, phosphorous - 2H <-> H + PO₃.
5.
a) Ka=[H][HCl]/[H₂CO₃]
b) Ka=[H⁺][HCOO^-]/[HCOOH]
6. because it's a 1 to 1 ratio.

also we are to do questions 6 to 15 by tomorrow.
next scribe is "romina".

Ka Problems

May 23, 2007

Okay, so today for class, we had a sub ... Mr. Newman. Yeah, all we basically did was review that "mini-booklet" Ms. Kozoriz gave to us about a week ago. I'm not sure what it's called, but it had the information about Arrhenius and Bronsted-Lowry and their definitions of acids and bases.

We also went over the Kw problems that was assigned to us last Thursday I think?

Yeeah, thats pretty much it, and I think we're having Mr. Newman again as a sub since he kept saying "tomorrow I'm going to go over ..." yeah but I'm not sure.

Anyway, the next scribe can be SERGIO.

Assignment on B-L and Arrhenius Acids/Bases

Arrhenius Acids and Bases

Acids and bases

Today was a test day so we really didn't do much so I won't have much to say during this post. As many of you will know the next section seems to be on acids and bases. Some points which can be found in the text are the pH concept which includes the method of finding the pH of acid and base solutions by way of calculations. Another set of information you might need to know will be the names of the researchers/scientist who contributed their theories into the research of acids and bases. Actually that might be all at the moment so really all I can say is to remind everyone to get pages 431 to 452 read and to get the question done.

The next to scribe today will be vehcsur.