Thursday, 02.26.09

In the beginning of the class, Ms. K showed us an animation about redox. To review this animation, click here:)...

After the animation, Ms. K went over Section 20.2 of OXIDATION-REDUCTION REACTIONS worksheet that the sub gave us. If you missed the class or simply wants to see the answers again, check the slideshow below.

Ms. K then started a new lesson about BALANCING USING OXIDATION METHOD. (note. this lesson is not on the yellow booklet).

To balance using the oxidationnmethod, we have to follow these steps:
STEP 1. DETERMINE THE OXIDATION NUMBERS.
STEP 2. DETERMINE THE NUMBER OF ELECTRONS TRANSFERRED PER ATOM/ION FROM THE CHANGED IN THE OXIDATION #s.
STEP 3. DETERMINE THE # OF ELECTRONS TRANSFERRED PER MOLE FROM THE SUBSCRIPT IN THE CHEMICAL FORMULA.
STEP 4. MAKE THE # OF ELECTRONS LOSS = # OF ELECTRONS GAINED BY FINDING THE SIMPLE COEFFICIENTS TO BALANCE THE # OF ELECTRONS TRANSFERRED.
STEP 5. BALANCE THE EQUATION AS YOU NORMALLY WOULD.

To see examples for each of these steps, pls see Ms. K's slideshow below....

We then answered SECTION 20.3 , # 1 question. Ms. K went over the answers for letters A to D, and can also be found in the slide show below...


IMPORTANT
TEST will be on TUESDAY. If you missed the class, dont forget to ask Ms K for the review worksheet she gave us, STUDY GUIDE, REDOX REACTIONS.


Thats it for this day..merci:) HAVE A NICE LOONG WEEKEND ^_ _ _ _^


the next scribe is...ASHLEY:)