Showing posts with label Q2Harish R.. Show all posts
Showing posts with label Q2Harish R.. Show all posts

Saturday, March 8, 2014

Blog - March 7, 2014

HOMEWORK: 2 Crash course videos posted in unit 9 moodle box - watch them and take notes on them, but take big picture notes. Summarize the point of each video, notes on the big idea.

http://www.youtube.com/watch?v=g5wNg_dKsYY&feature=youtu.be
http://www.youtube.com/watch?v=7qOFtL3VEBc

(The second link on Mrs. Friedman's page was broken for me, I think the second link on this blog is the video it was supposed to be.)

MRS. FRIEDMANN DEMONSTRATING EQUILIBRIUM:



CLASS ACTIVITY IN THE PIT: This was an equilibrium and balance activity in the pit using the 21 people in our class. Many situations were posed in which we were challenged to maintain equilibrium. Here were the patterns/requirements:

1) Maintain equilibrium. To achieve this, we lined people up as tall people on the ends of the people line, moving towards the shortest person in the class in the middle.

2) Maintain equilibrium and symmetry. To get this, we split the pit in two with one person in the middle and put 10 people on each side of the pit.

3) Maintain moving equilibrium and symmetry. Same as number 2 but the people were moving.

4) Maintain equilibrium and symmetry but people moved from side to side. To achieve this, we set up like number two but sent people from side to side. As one person went to one side, a different person went to the opposite side.

5) Maintain equilibrium and symmetry moving more than one person from side to side. We did the same as number four but sent two people from side to side.

6) Maintain equilibrium but not symmetry. To do this, we had people moving randomly on each side.

END OF CLASS DEMO (WITH FIRE): 



Friday, November 1, 2013

Class Blog - November 1st, 2013

On the worksheet that was assigned for homework, you must write the net ionic equation as well as the molecular (completely balanced) equation

http://en.wikipedia.org/wiki/Solubility_table
(After a 10 minute discussion, we also successfully established that Wikipedia can be trusted mostly...) 

For a reaction to happen, one of the ions must be insoluble. 

  • For the molecular equation, don't add charges.
  • For the net ionic equation, add charges. 
  • For the complete ionic equation, add charges.
-If you need help with the difference between net ionic equations and complete ionic equations, this site may help:
http://www.occc.edu/kmbailey/chem1115tutorials/Net_Ionic_Eqns.htm

We also discussed the solubility rules (which can be found on Solubility of Common Compounds homework worksheet. 

Sodium oxide reacts violently to form sodium hydroxide. This means that sodium oxide is not soluble. Potassium oxide also reacts to form potassium oxide.

We also got a graph of the solubility of sodium acetate. 

The process of making it soluble is very precarious because it must be a certain temperature and a certain saturation so that it will have enough water molecules to make it soluble.  

Next we went to the Solubility Curve Practice Problems worksheet (which we received before today). We noticed that
  • The lines that were solid went up.
  • The lines that were gases went down. 

HW:

-Solubility Curve Practice Problem Sheets

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