The Water Molecule
http://homewaterdistiller.org/wp-content/uploads/2011/04/water1.jpg
Interesting Facts About Water
The most abundant compound in most living things is water.
70% of an adult's body is water Water dissolves more substances than any
other liquid
http://www.idswater.com/Common/header/Img-water.jpg
Facts Continued
• Drinking too much water can cause water intoxication. It occurs when water dilutes the sodium level in the bloodstream & causes an imbalance of water in the brain. This condition is termed at hyponatremia.
http://3.bp.blogspot.com/_wrMEmICX6EI/THd2SJ0pZCI/AAAAAAAACwg/CMNOLDd1Kcg/s400/HYPONATREMIA+1.JPG
Facts Continued
• The earth is a closed system, similar to a terrarium, meaning that it rarely loses or gains extra matter. The same water that existed on the earth millions of years ago is still present today.
http://www.steripen.com/stuff/contentmgr/files/1/ed19577e905f1bed35a5910f3da70b33/misc/global_water01.jpg
Facts Continued
• Much more fresh water is stored under the ground in aquifers than on the surface.
http://www.fijiwater.com/wp-content/uploads/2010/06/Fiji_1_Water_072310_Aquifer.jpg
Facts Continued
The U.S. uses about 346,000 million gallons of fresh water every day.
By the time a person feels thirsty, his/her body has lost over 1% of its total water amount.
The weight a person loses directly after intense physical activity is weight from water... not fat!
http://surveywater.files.wordpress.com/2009/12/earth-water-tap-supply-thumb4824558.jpg
Molecular Structure
When hydrogen and oxygen combine to form water, water is the PRODUCT.
http://quantumfreak.com/wp-content/uploads/2008/10/hydrogen-oxygen-and-water.jpg
Molecular StructureThe oxygen atom is on one end of the molecule & the
hydrogen atoms are on the other end.
The oxygen end of the molecule has a slight negative charge and the hydrogen end of the molecule has a
slight positive charge.
http://xnet.rrc.mb.ca/rcharney/The%20water%20molecule_files/molecul2.jpg
Why is the H2O Molecule Polar?
A water molecule is polar because there is an
uneven distribution of electrons between the
oxygen & hydrogen atoms.
http://www.school-for-champions.com/chemistry/images/polar_molecules-h2o.gif
Hydrogen Bonds
Because of their partial (+) & (-) charges, polar molecules such as water can attract to each other.
http://library.thinkquest.org/26153/habitat/images/molekule.gif
Hydrogen bonds are not as strong as covalent or ionic bonds, but water's ability to form multiple hydrogen bonds is responsible for many of its
special properties.
http://www.essenceoflife.com/images/science/figure1.gif
A single water molecule may be involved in as many as 4 hydrogen bonds at the same time.
Demonstrating Hydrogen Bonding
Activity
http://1.bp.blogspot.com/_Ztj2bLAAZH8/TNN2FHcyJxI/AAAAAAAAACY/LOSe85jg_xk/s1600/water+chemical+name.jpg
Vocabulary Review
What is makes a water molecule POLAR?
http://img.metro.co.uk/i/pix/2008/03/polarbearswimR_450x350.jpg
A polar molecule has an unequal distribution of electrons; the two ends of the molecule have opposite charges.
http://www.sogmin.org/Newsletters/2011%20NLs/positive-negative.jpg