Welcome back to class!
Week 17 Resources/ Assets
Updated January 20th, 2019
Please make sure you READ everything on this page or you will miss important details. I will archive past weeks Announcements pages for a limited time only under the Trimester 1 and 2 tabs, if you need to go back to a particular weeks information for any reason.
Week 16 in Review
We continued this week in Chapter 9 - Stoichiometry. Please take the time to read "Calculating the Percent Yield," on pages 256 - 258 on your own. It really is a very, very easy concept. Chemists care about percent yield whenever they are performing a reaction - they want to know that their techniques were clean and tight - that they were able to recoup as much product as theoretically possible. For example, if stoichiometrical calculations from a balanced chemical equation would suggest a theoretical yield of 64.0 grams of a given product, but the chemist only acquires 23.5 grams, then the chemist might have done something wasteful or wrong. His or her percent yield would be calculated as follows:
(23.5 grams/ 64.0 grams) x 100 = 36.7% yield
(41 cookies/ 60 cookies) x 100 = 68% yield
By this poor yield, you may be fired as a baker, or informed of means by which you keep the cat from eating the dough!
Upcoming Week 17
On Tuesday, we will start Chapter 10 - States of Matter. The chapter is broken down accordingly:
Upcoming Test on Chapter 9
I will make the small test on Chapter 9 available by next Thursday afternoon. Since the test will cover only one chapter it will only be worth about 50 points, and due next Tuesday, January 29th.
So that you are properly prepared for classes next week, please make sure you do the following by:
Tuesday, January 22nd:
Upcoming Assignments Due
Tuesday, January 29th: