Recording for 1/27 Chemistry class - Quantum Electron Configuration

http://youtu.be/tv1qjGG7UgQ

1/27 Chem update and homework due 2/3

Hi folks,

Today we spent time on one of the more confusing concepts of chemistry. The confusing concept of the quantum method of electron configuration. This is quite tricky since it is something that is very hard to visualize. Once you do a few, however, it gets fairly simple. Homework this week will be to do quite a few of these configurations.

Homework due next week is to:

Write the quantum electron configurations of
a. Na b. P c. Ar d. Rb e. Ru f. Sb g. Po

Read Chapter 5 pgs.146-152
Answer Review Questions Pg 166 and 167 #'s 22 - 37

Error on this weeks homework for Chemistry

Hi folks,

Robert caught an error I made on the homework. In #10 there is an extra 2Cl2 in the products. Remove that. It shouldn't be there.

Jim Mueller

1/20 Chemistry update and homework due 1/27

Hi folks,

Today we spent a bit more time on getting that tricky ionic molecule naming down pat.  It's quite counter-intuitive and so takes quite a while to get straight.  We also spent some time on getting to know some of the major reaction types.  Combustion, synthesis, decomposition, single displacement and double displacement.  

Homework for this week is to do the following questions AND take a look at the photo included in the email.  See if you can find the actual products for all of the names on the shopping list.

What type of reaction are the following reactions.

1. 2Li + 2H2O —> 2LiOH+ H2

2.  CA(OH)2 + 2HCl —> CaCl2 + 2 H2O

3.  C + O2 —> CO2

4. 2NaOH + H2SO4 —> 2H2O + Na2SO4

5. Sr + I2 —> SrI2

6. Mg + Zn(NO3)2 —> Mg(NO3)2 + Zn

7. BaCl2 + K2CO3 —> BaCO3 + 2KCl

8.  C3H8 + 5O2 —> 3CO2 + 4H2O

9. 2Be + O2 —> 2BeO

10.  CH4 + 2Cl2 —> 2Cl2 + CH2Cl2 + 2HCl

Recording of 1/13 Chemistry Class - Balancing Equations and Polyatomic Ions

http://youtu.be/ZnLh7xpwEqY

1/13 Chemistry update and homework due 1/20

Hi folks,

Today we spent some time getting to know some of the major polyatomic ions.  We also took time figure out how to use the polyatomic ions in terms of naming molecules.  With that out of the way, we now have learned the alphabet (the periodic table) and how to make words with it (making molecules).  This brings us to creating sentences with our words, in other words, chemical equations.  We took a look at the different parts of a chemical equation and began to work a bit on balancing them.  

For homework this week, 

Do the exercises in the enclosed .pdf.  I've included the answers as well.  

I would HIGHLY recommend taking another look at the naming worksheet I had you do for homework  a while back.  Quite a few of you did poorly on that part of the last exam.   

MAKE SURE if you get something wrong you know EXACTLY why it's wrong.  Sorry for all the caps and the bold but I get the feeling folks are just doing the problems, checking their answers and moving on.  That's a No No!  If you get it wrong, you really need to know why.  Otherwise it's going to come along on a test and get'ya.  If you get a problem wrong on the homework, REDO IT FROM SCRATCH.  Do Not Assume you know how to do it from just looking at the answer.  It took me until college to figure this out.  I'm handing this piece of advice to you for no extra charge.  Take advantage of it.  :)

1/6 Chemistry Class Update and Homework due 1/13

Hi folks,

Today we took the time to go over a bit more background vocabulary and take a look at a few more periodic trends. We examined the concepts of electronegativity, ionization energy and atomic radius.

Homework for this week is to do the enclosed .pdf.

Hint: most metallic means that is its dying to give away an electron. It is the opposite of "electronegative" and is often called "electropositive".

Recording for 1/6 Chemistry Class - Periodic Trends

http://youtu.be/DI9Rejv4OIA