Percent Dissociation

Tuesday, May 25th 2010

Today, we had a mini refresher, from what we learned on Friday. The Ka and Kb equations. We also, talked about the pH lab we did last Tuesday as well. To review some more, we did this interactive Naming the Acids sort of thing.

We went over questions 1-4 on Acid-Base Equilibria Worksheet 4.

We did example 8, on page 30 in the booklet. We also, learned a new topic in class. It was how to calculate the Percent Dissociation.

The formula to calculate Percent dissociation is

Percent dissociation = Concentration of Dissociation Species

---------------------------------------------------- x 100%

Original Concentration of Acid or Base

We also did examples 10 and 11, as practice. We were assigned to do Assignment 4 in the yellow booklet, the odd numbers. You could do the even questions as practice if you want.

*Grade 12 bbq tomorrow! Don't forget to bring sunscreen. =]

**Our chemistry exam is on Monday, June 21st 2010 in the afternoon! 27 more days till our exam.

Our next scribe is.....annab.

Friday, March 12, 2010

Today in class, we went over the rest of the questions (5-7) in the yellow booklet on page 13. We also did a Flame Test lab. It was awesome, except for the smell of burning wood. We got to see what colors metallic ions give off in a flame.

For example: Sodium Chloride gives off a orange-yellow flame.

Barium Chloride gives off a green flame.

We were given a worksheet to complete for Tuesday and we were supposed to read pages 14-18 and do the questions on page 19.

The scribe will be Arielle.