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POLAR COVALENT
Water is a ____________________
molecule
UNEVEN pattern of electric charge
• ___________
+
-
• ______ & ________ poles
Water molecules form _____________bonds
HYDROGEN
with each other
• + from one molecule attracted to – of
neighbor
STICKY
• Makes molecules “__________”
HYDROGEN BONDING PRODUCES
EMERGENT
_____________PROPERTIES
OF WATER
COHESION
• ___________
ADHESION
• ______________
“UNIVERSAL” SOLVENT
• ___________________________
HIGH HEAT OF VAPORIZATION
• ________________________________
ICE FLOATS
• ___________________
• HIGH HEAT OF FUSION
• THERMAL CONDUCTIVITY
COHESION
• ___________
HYDROGEN bonding __________
BETWEEN
water molecules makes them stick together
• _______________
Surface tension
Water has a “skin”
Tends to “bead up”
• Drinking straw
http://online-english-lessons.eu/wordpress/2011/06/idiom-water-off-a-ducks-back/
http://morrisonlabs.com/meniscus.htm
http://papertowelworld.com/images/bounty.gif
ADHESION
• HYDROGEN bonding between water and
OTHER
________molecules makes them stick to
substances
ACTION
• CAPILLARY
_____________________
Water climbs up paper towel
MENISCUS
• ______________________
PLAY MOVIE HERE
HYDROPHILIC
WATER “loving”
_______________
POLAR
• __________
molecules are attracted to water
ionic
• ____________
“Like dissolves like”
• _____________________
HYDROPHOBIC
WATER “fearing”
_______________
NON POLAR molecules move away from water
• ____________
Non-ionic
• ____________
“Oil and water don’t mix”
• _____________________________
HIGH SPECIFIC HEAT
CHANGES in temperature
Resists ___________
• takes a lot to heat it up
• takes a lot to cool it down
MODERATES
_______________ temperatures on Earth
http://en.wikipedia.org/wiki/File:Globe.png
WATER HAS HIGH
HEAT OF VAPORIZATION
ENERGY required to change from
Lots of _______
liquid to gas because water is a
poor thermal conductor.
http://www.school-for-champions.com/science/evaporation.htm
WATER HAS HIGH
HEAT OF FUSION
ENERGY required to change from
_______
solid to liquid
http://amitjathar007.blogspot.com/2011/06/why-does-ice-float.html
ICE FLOATS !
Most (ALL?)substances are
MORE
_______dense
as solids
than liquids.
. . . NOT WATER!
HYDROGEN bonds form
__________
a crystal with loose structure
so SOLID ICE
LESS DENSE
is ______________
than LIQUID WATER.
http://www.destination360.com/north-america/us/michigan/michigan-ice-fishing
WATER FORMS IONS
If concentration of two ions
EQUAL water is ____________
NEUTRAL
is ______,
If [H+] > [OH-], water is ________
ACIDIC
If [H+] < [OH-], water is ________.
BASIC
Log scale like Richter for
measuring earthquakes
A
pH = 2
B
pH = 5
1000 times _________
more
Solution A is _____
acidic
than solution B
pH = -log([H+])
Log scale like Richter for
measuring earthquakes
A
pH = 9
B
pH = 7
100 times _________
more
Solution B is _____
acidic
than solution A
pH scale measures amount of
acidity or [H+]
-7
7
1 X10 =[H+] pH =___
-4
4
1 X10 =[H+] pH =___
-14
[H+] [OH-] = 10
-6
-8
If [H+] = 10 , then [OH-] = 10