Showing posts with label Q3 Allie Boland. Show all posts
Showing posts with label Q3 Allie Boland. Show all posts

Tuesday, March 18, 2014

Today's Blog (3/18/14)

Tuesday, April 18. 2014!

Next Scribe: Elaine Sine
  • First we checked in our graph homework. 
  • Then we got back our old work (labs and worksheets).
  • Then we checked over the equilibrium packet as a class.
  • Then we took notes! :)

*** If equilibrium constant (K) is K > 1 then it favors the PRODUCTS, if K < 1 then it favors the REACTANTS

Today's Notes:

Chemical equilibria
(For a closed system)

Reactants Products

  • [] = means concentration (Moles/L)
  • [Reactants] and [Products] never change once equilibrium is reached
  • Looks like the reaction has stopped, but actually occurring simultaneously
  • Closed sustems are at or apporaching equilibrium
  • At equilibruim, the RATIO of [Reactants] to [Products] = constant
A⇌2B



The test is on Friday!


Joke of the day:
this one took me a while...

Homework: 3 worksheets passed out in the beginning of the class

Tuesday, February 4, 2014

Tuesday, Feb 4 BLOG

Blog for Tuesday, February 4


  • First we checked in homework & received the Unit 8 Review packet
    • No video for this unit, unless one is found from last year
    • Test is Friday
  • Then we continued taking notes & watched a demo


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Hybridization


ex. NH3 Molecule: Trigonal Pyramid

The number of hybrid orbitals produced is the SAME as the number of atomic orbitals that blended.

S PPP DDDDD FFFFFFF
4 atomic orbitals made 4 hybrid orbitals so... =(SP3 hybridized)

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ex. CO2      16 valence electrons
=(SP hybridized)

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ex. KrF4      38 valence electrons

=(SP3D2 hybridized)

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Sigma and Pi Bonds

(Double + Triple Bonds...)


^ There are 4 electrons in this SP2 orbital.
    • There are 2 in a SIGMA bond (2 single bonds)
    • And 2 in a PI bond
ex. SO2
Pi bonds allow electrons to spread out over the whole molecule. They are the reason resonance is possible. (Delocalization) 

Need to know: 
1. Sigma bonds stuck
2. Pi bonds can move
3. Single bond = sigma
4. Double bond = 1 sigma + 1 pi
5. Triple bond = 1 sigma + 2 pi

Tomorrow: Are molecules more like magnets or marbles?


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Homework for Tonight



    • TWO Webassigns:
      • One - due tonight
      • Other - due tomorrow (Weds @ 12am)
- Allie Boland

NEXT SCRIBE: Marlye Jerva (we switched)