Name:___________________________________
Aim #24: The Properties of Water
Date:_____________________________
Bonewald/Schoepfer
1. Water (H2O) is a(n) _________________________ (element/compound).
2. A water molecule is made up of 2 _________________________
atoms and 1 _________________________ atom.
3. These hydrogen and oxygen atoms are both nonmetals held together by _________________________
bonds.
4. Why is water so important?
a.
b.
c.
5. In the box below, draw the Lewis Dot Structures for 1 oxygen atom and 2 hydrogen atoms.
6. Describe how and why these hydrogen and oxygen atoms bond using your picture above and your
knowledge of covalent bonds.
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
7. Water is a Polar Covalent bond:
Even though oxygen and hydrogen
are sharing electrons, they are not equal.
Electrons spend more time by oxygen,
Giving the oxygen side of water a slightly
__________________________ charge
and the hydrogen sides of water a slightly
__________________________ charge.
Name:___________________________________
Aim #24: The Properties of Water
Date:_____________________________
Bonewald/Schoepfer
8. Answer the following questions based on the diagram below:
a. How many water molecules are in this diagram?_________
b. Draw where you would find slightly + and
Slightly – charges onto the diagram.
c. What are the two types of bonds shown
and where do they occur?
i. __________________________________
ii. __________________________________
d. Explain why the hydrogen bonds occur between water molecules.
________________________________________________________
________________________________________________________
________________________________________________________
LET’S SUMMARIZE:
Water (H2O) is a ___________________ molecule → ____________________ between water molecules →
allows water to have ___________________ ___________________.
Special Properties of water:
1. Ice floats in Water!
The molecules of water in ice are ___________________________ packed than those of liquid water.
a. Use this special property of water to explain why an iceberg floats in water.____________________
_________________________________________________________________________________
_______________________________________________________________________________
b. Think about how convection currents (for example: in the mantle of Earth or in the Atmosphere)
occur. How does this compare to ice floating in water?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Name:___________________________________
Aim #24: The Properties of Water
Date:_____________________________
Bonewald/Schoepfer
2. Cohesion, Adhesion, and Capillary Action!
a. Cohesion:_____________________________________________________________________
Ex.________________________________________________________________________
b. Adhesion:_____________________________________________________________________
Ex.________________________________________________________________________
c. Capillary Action:_______________________________________________________________
Ex. ________________________________________________________________________
d. How can you describe the picture (of dew on a leaf
surface) to the right using the following vocabulary words?
a. Cohesion:__________________________________
__________________________________________
b. Adhesion:__________________________________
__________________________________________
e. Describe the results of the experiment shown to the right
(in which the petals of a flower change color when placed
in colored water) using the concept of capillary action.
_______________________________________________
_______________________________________________
3. Water takes longer to heat up in the summer and longer to cool down in the winter!
Ex. Cities near the ocean tend to have less change and less extreme temperatures than inland
cities. A Midwest state, such as Nebraska, will have colder winters and hotter summers than
Oregon, which has a higher latitude but has the Pacific Ocean nearby.
a. Using this special property of water, explain why
Ferdinand the Fish is so happy living in pond water.
_________________________________________
_________________________________________
_________________________________________
4. Water is known as the universal solvent!
a. Water can dissolves more substances
than any other liquid
Living in this pond is
SO
COMFORTABLE!