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Chapter 2 Blog:  The Chemical Basis of Life I (Robert)

Page history last edited by Robert Canuel Jr. 13 years, 8 months ago

In the first section of this page, you will write a daily summary of that day's class.  For example in  your chapter 2 blog, your first entry should be titled 9/3/10.  You should then write a one or two paragraph summary of that day's lecture, outlining the major points.  In the second section, you are required to add two items (link to a website, video, animation, student-created slide show, student-created PowerPoint presentation) and one journal article pertaining to a topic in this chapter.  A one-paragraph summary must accompany each item describing the main idea and how it applies to the lecture topic.  Please see the PBWorks help guide for assistance embedding video and other items directly in the page.  I will also produce a how-to video on using tables to wrap text around items and other useful tips.  Please see the syllabus for organization and grading details.

 

A.  Daily Blog

9/3/10

     The first real day of lecture. We reviewed some things on atoms. Things such as the amount of protons dictating which element the atom was. We also went over isotopes, which are atoms with the same atomic number but with different atomic masses. The different types of bonds between the atoms were reviewed as well. These bonds included ionic bonds, covalent bonds and hydrogen bonds. Ionic bonds cause one atom to give away an electron to another atom so that both atoms have full valence shells. Covalent bonds are when atoms share their valence electrons to fill their valence shells. There are two types of covalent bonds. They are polar or nonpolar. Polar covalent bonds occur when the shared electrons orbit one atom longer than the other. Nonpolar covalent bonds occur when the shared electrons orbit around the atoms equally.

 

9/8/10

     Today we started off with a cellphone poll on why the covalent bonds of water are polar. Then we continued by discussing the properties of water and the importance of hydrogen bonds. Because of the ability to form hydrogen bonds water has a high heat of vaporization and fusion. We also talked about how ions dissolve in water and about hydrophobic molecules. Molecules are hydrophobic if they are nonpolar and hydrophilic if they are polar. The topic of Hydrolysis was also talked about. Hydrolysis is the process in which a larger molecule is broken down into smaller molecules by adding water.

 

B.  Useful Materials

 

Items: 

YouTube plugin error                 

This video helps explain ionic and covalent bonding by showing a visual

representation of the atoms and their electrons. For the ionic bonding example

the elements Natrium and Chlorine are used. For covalent bonding, two Hydrogens

and an Oxygen molecule are used.

 

http://en.wikipedia.org/wiki/Properties_of_water

How 'bout it

A link from one wiki to another

This page from Wikipedia explains and describes the properties of water in

great detail. Those properties include: Heat of vaporization or fusion, density of water and ice,

hydrogen bonding, adhesion, surface tension, capillary action, its solvent properties, etc.

 

Peer Reviewed Article: 

 

http://www.ncbi.nlm.nih.gov/pubmed/20564334

What is the minimum number of water molecules required to dissolve a potassium chloride molecule?

 

This article discusses how water would dissolve potassium chloride.The water molecules would

split the molecules into K+ and Cl- and the water molecules would surround them. The slightly positive

Hydrogen side toward the Chlorine anion and the slightly negative Oxygen side toward the Kalium(Potassium)

cation. This relates to how water dissolves ions or other polar substances.

 

Comments (7)

Derek Weber said

at 1:47 am on Sep 9, 2010

9/3: Updated. Thanks.

Derek Weber said

at 1:52 am on Sep 11, 2010

9/8: Updated. A bit short. If you mention a topic you should define it (hydrophobic, hydrolysis, etc).

Robert Canuel Jr. said

at 9:53 am on Sep 11, 2010

Got it

Derek Weber said

at 4:02 am on Sep 16, 2010

Wiki foul. No links from Wikipedia. That is a forbidden act and will result in a loss of ninja privilege. Also, the spacing of you paragrpahs is off. Make sure to not to hit return in between each line. Try the green arrows at the top right corner to exapnd the editor.

Derek Weber said

at 4:02 am on Sep 16, 2010

Nice journal article BTW.

Robert Canuel Jr. said

at 6:16 am on Sep 16, 2010

Understood and thank you

Derek Weber said

at 4:11 am on Sep 23, 2010

No, thank you.

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