More Solution Stoichiometry

Fun with Homework 

To start off class today Mrs. Friedmann checked in the three worksheets we had for homework last night.  We then went over these three sheets.  If you missed class, the key is posted on the moodle page under Unit 4 keys.

Fun with Molarity

Next, Mrs. Friedmann passed back our Concentration and Molarity Simulation packets.  We went over these, and the key is also posted on the moodle page under Unit 4 Keys.  

Fun with Supersaturation

After that, Mrs. Friedmann showed us the demonstration of the supersaturated sodium acetate solution.  The sodium acetate packet was put in boiling water to heat it up so the the water could dissolve all of the sodium acetate.  Then the packet was slowly cooled down until it became supersaturated.  The liquid was very syrupy and slow moving.  When Mrs. Friedmann flipped the metal disk around that was inside the packet, the sodium acetate went out of solution and crystalized.  The packet became warm because all of the heat energy we put into it when putting it in the boiling water is now being released.  Below is a video of this happening:

  

More Fun with Homework

This brought us up to the end of class.  Our homework for tonight is the two worksheets that were handed out in class today which are the Molarity Thinking Problems worksheets.  These can be found in the Unit 4 handouts folder.  If you are struggling with these problems, post them on the blog!  Try to check the blog again by 10 PM and see if you can answer anyone's questions.

Fun with Blogging

The next blogger is...Valerie K