Chapter 13:
Water and Its Solutions
Practice Test
1.
The attractions between water molecules are called ________________.
a.
covalent bonding
b.
weak bonding
c.
hydrogen bonding
d.
ionic bonding
Hint
2.
Water's ___________________ helps keep you cool on a hot day.
a.
high density
b.
high heat of vaporization
c.
large volume
d.
low freezing point
Hint
3.
Your body is about __________ water by weight.
a. 10%
b. 60%
c. 90%
d. 75%
Hint
4.
A solute __________________ of the solvent.
a.
raises the boiling point
b.
does not affect
c.
raises the freezing point
d.
lowers the boiling point
Hint
5.
What is the molarity of a solution prepared by dissolving 50.0 g of NaCl to make 500.0 mL of solution?
a.
1.71 M
b.
1.17 M
c.
0.855 M
d.
0.100 M
Hint
6.
A ________________ solution contains more than the usual maximum amount of solute.
a.
dilute
b.
concentrated
c.
saturated
d.
supersaturated
Hint
7.
Atoms of this element do NOT participate in hydrogen bonding.
a.
nitrogen
b.
oxygen
c.
fluorine
d.
silicon
Hint
8.
The polarity of the water molecule accounts for water's ________________.
a.
unusually high boiling point
b.
unusually low melting point
c.
unusually high mass
d.
formula
Hint
9.
The atoms in the water molecule are linked by ___________ bonds.
a.
triple
b.
pure covalent
c.
polar covalent
d.
ionic
Hint
10.
The bond angle in the water molecule is about __________.
a.
105
o
b.
90
o
c.
180
o
d.
45
o
Hint
11.
Capillarity accounts for the rising of liquids in ___________________.
a.
narrow tubes
b.
oceans
c.
soda bottles
d.
rivers
Hint
12.
A solution that contains very little solute is described as ____________.
a.
dilute
b.
massive
c.
concentrated
d.
saturated
Hint
13.
Because of its ________________, a large body of water helps moderate the temperature of the surrounding area.
a.
low specific heat
b.
boiling point
c.
high specific heat
d.
low density
Hint
14.
Ice is ___________ liquid water.
a.
equally as dense as
b.
more fluid
c.
less dense
d.
more massive
Hint
15.
The _______________ state of water is highly organized.
a.
liquid
b.
solid
c.
gas
d.
plasma
Hint
16.
Water forms drops because of its ________________.
a.
polarity
b.
volume
c.
surface tension
d.
mass
Hint
17.
Because of all its water, Earth is nicknamed the _____________.
a.
dense planet
b.
wet planet
c.
spherical planet
d.
blue planet
Hint
18.
H
2
O is most dense at __________.
a.
32
o
F
b.
0
o
C
c.
277 K
d.
-32 K
Hint
19.
Driven by concentration difference, the movement of molecules through a semipermeable memebrane is called ___________.
a.
osmosis
b.
reverse movement
c.
capillarity
d.
boiling
Hint
20.
The water molecule is polar partly because of its _____________.
a.
mass
b.
geometry
c.
volume
d.
weight
Hint
