Name_____________________________________________________________ Date___________________________ Period__________________
Draw a water
molecule here
The Extraordinary Properties of Water – Study Guide
A water molecule (H2O), is made up of three atoms --- one
and two
.
Water is Polar
In each water molecule, the
attracts more than its "fair share" of
The oxygen end “acts”
molecule to be
and the hydrogen end “acts”
However, Water is
Which causes the water
(equal number of e- and p+) --- Zero Net Charge
Add + and – symbols to your
drawing above showing the positive
and negative sides of the molecule
Interactions Between Water Molecules
Negative Oxygen end of one water molecule is attracted to the Positive Hydrogen end of another water molecule to
form a
Draw 2 or more water
molecules bonded together
Formed between a highly Electronegative atom of a polar molecule and a Hydrogen
One hydrogen bond is
, but many hydrogen bonds are
Properties of Water
At
, pure water boils at
The boiling temperature of water
and freezes at
at higher elevations (lower atmospheric pressure).
For this reason, an egg will
at higher altitudes
Cohesion
of one water molecule to another (actually any time two particles of the same substance are
attracted to each other)
Results in
(a measure of the strength of water’s surface)
Produces a
on water that allows insects to walk on the surface of water.
Adhesion
Attraction between
the molecules of any two substances.)
Water will make
cotton.
and
. (Actually the attraction between
with other surfaces such as glass, soil, plant tissues, and
-water molecules will “tow” each other along when in a thin glass tube.
Example:
towels soak up water.
List some examples of adhesion:
process which plants and trees remove water from the soil, and paper
High Specific Heat
to raise or lower 1g of a substance 1° C.
Water
temperature change, both for
Water can
in actual temperature.
and
or
.
large amounts of
with little change
Water is Less Dense as a Solid
Water is less dense as a
(ice) than as a
(ice floats)
water has hydrogen bonds that are constantly being
Frozen water forms a
and reformed.
lattice whereby molecules are set at fixed distances.
Solutions & Suspensions
Water is usually part of a
.
There are two types of mixtures:
and
Water is called the ________________ Solvent
Water
LOTS of things.
Remember:
SOLVENT =
amount)
(usually the substance in the larger
SOLUTE =
amount)
(usually the substance in the smaller
Other
molecules can be dissolved by water.