Wrap Up Properties of Water and intro to organic chemistry

Catch up time!!

Wednesday and Thursday of last week we did not have any daily question.  Wednesday you took the open notes quiz on basic chemistry and water, then on Thursday you did some book work for the next section.  Friday we did have the following daily questions and finished up the notes on water. (specifically looking at specific heat, density of water as a solid and water as a universal solvent)

Friday September 14th
Water is able to resist drastic changes in temperature because it has a high Specific heat (heat capacity)

Why is this important to us? (As humans)  Since we are made up of approximately 70-75% water, this fact allows us to minimize major temperature fluxuations in our body temperature.

Monday September 17th we started with the following daily questions

Monday September 17^th

Water in solution disassociates into two ions.  What are these two ions? (What caused the charges to happen?)

H+ (Hydrogen Ion) and OH- (Hydroxide ion)  The Hydrogen ion gained a positive charge when it LOST and ELECTRON.  Where did that electron go????........ to the Hydroxide molecule giving it a negative charge.  Remember that water is a polar molecule and therefore its electrons are shared unevenly.  When Water dissacociates in solution the oxygen actually "takes" that extra electron.

Because water does this it is considered a universal Solvent.  (Remember though, I put this in quotations because I want you to know that water does NOT litterally dissolve EVERYTHING in the universe.   We will see some of these examples later!!)

I then had you watch two introductory videos from the "crash course" guy.  The first on Carbon and the second on three of the four main macromolecules of life.  This was to serve merely as an introduction to the notes we will be taking tomorrow. 

We'll plan on a DQ2 on Friday.  Please check edline for any notes.  Tomorrow we will work through the second half of the "Chemistry of Life" notes.