HW packet # 49

The question is:

Which of the following ions contains both sigma and pi covalent bonds?

1. OH-
2. Cl0-
3. CN-
4. PO4 3-
5. SO4 2-

I know this question is really asking which ion has double or triple bonds, but I can find structures of the sulfate ion with double bonds. Why is CN- the right answer?

Happy Thanksgiving!

I hope your Thanksgiving was enjoyable and filled with thanks ... for chemistry! Reminder:

Monday: Review quest homework and 100 question packet. Within the packet, disregard any question dealing with transition metals or XeF5. Otherwise, everything else is fair game, though certain questions are more likely than others. Be sure to spend time memorizing geometries, otherwise it will be tough to do well.

Tuesday: TEST!

number 31 doesnt make sense. the answer that it says is correct isn't correct.

Quest Homework Posted

The Quest assignment is posted. The questions are roughly in order of what we learned, so if you'd like to get a jump on it (as it is 35 questions), you can at least to the first half.

Have fun and post questions!

Today's Video on Hybridization

We are embarking on Chapter 9 now. Here is a link to the video we watched in class if you'd like to watch it again.

http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/orm1s2_7.rm

Thanks to Mr. Bollermann at West for finding the video.

Another interactive activity to reinforce structures (remember, you need to memorize these geometries):

http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/VSEPR.swf

Feel free to poke around and find other useful videos for our understanding.

Holden

#31 of Review

Can someone explain how to do 31 of the Q1 review. I don't understand how to get the ion concentration from the molarity of a solution?

Q1 Review

Question about 8 on the review packet? What is lattice energy?
Question about wording of 11? what is Bronsted and what is meant by not a base or acid?

response to #8 by blahblahblah...

all of the other atoms other than O

help before test!

why does Mg have a greater first ionization energy than Na? And how does Na have a greater second ionization energy than Mg at the same time??

This week and Quest Homework

Quest homework is posted. It is due Thursday, 11/11. I would advocate you wait to do it until after we discuss the practice set of questions.

Monday: Review atomic practice questions. Periodic Table questions assigned.
Tuesday: Review PT questions.
Wed: Off
Thursday: Review Quest. Introduce bonding (Chp 8).
Friday: Test (50-60pts).

Extra Explanation of Quantum Numbers

Here is a great addition to the notes we took in class. Its basically the same but there are some simple questions at the end that helped me remember the material.

http://www.science.uwaterloo.ca/~cchieh/cact/c120/quantnum.html

Physics and Chem Sites

here is the site you wanted me to post..

http://www.periodicvideos.com/

interesting if u like chem (short video about every element)..

It is really a daughter site of this guy here:

http://www.sixtysymbols.com/

sixtysymbols is a physics site that has a little anecdote or experiment about sixty different physics symbols

-->oh and for those of you who were interested in schrodingers cat, just click on the little picture of the cat and it clarifies the theory. there is also a video on wave function, but as you can see from watching the video, even quantum physicists have a tough time explaining it...

The best periodic table ever.

http://azuregrackle.com/periodictable/table/

Welcome!

The function of this blog is to provide opportunities for you to support each other in the completion of this course. You may ask content related questions, ask for help with Quest homework questions, or ask for help with the material in any way. Be supportive and helpful! Also, if you come across anything science related that is interesting, post it!