Water and Its Solutions
Practice Test
1.
The atoms in the water molecule are linked by ___________ bonds.
a.
ionic
b.
triple
c.
polar covalent
d.
pure covalent
2.
H
2
O is most dense at __________.
a.
32
o
F
b.
0
o
C
c.
277 K
d.
-32 K
3.
Water forms ______________ in a glass tube.
a.
heavy water
b.
hydrogen and oxygen
c.
a concave meniscus
d.
a convex meniscus
4.
The polarity of the water molecule accounts for water's ________________.
a.
formula
b.
unusually high boiling point
c.
unusually high mass
d.
unusually low melting point
5.
A solution that contains very little solute is described as ____________.
a.
massive
b.
dilute
c.
saturated
d.
concentrated
6.
Water forms drops because of its ________________.
a.
surface tension
b.
mass
c.
polarity
d.
volume
7.
Water's ___________________ helps keep you cool on a hot day.
a.
low freezing point
b.
large volume
c.
high heat of vaporization
d.
high density
8.
Atoms of this element do NOT participate in hydrogen bonding.
a.
fluorine
b.
silicon
c.
oxygen
d.
nitrogen
9.
A ________________ solution contains more than the usual maximum amount of solute.
a.
concentrated
b.
dilute
c.
saturated
d.
supersaturated
10.
Driven by concentration difference, the movement of molecules through a semipermeable memebrane is called ___________.
a.
reverse movement
b.
boiling
c.
capillarity
d.
osmosis
11.
Capillarity accounts for the rising of liquids in ___________________.
a.
soda bottles
b.
oceans
c.
narrow tubes
d.
rivers
12.
Hard water contains significant concentrations of these.
a.
chloride ions
b.
sodium ions
c.
iron atoms
d.
calcium and magnesium ions
13.
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.
0.100 M
c.
0.855 M
d.
1.17 M
14.
A solute __________________ of the solvent.
a.
raises the freezing point
b.
lowers the boiling point
c.
does not affect
d.
raises the boiling point
15.
The _______________ state of water is highly organized.
a.
solid
b.
plasma
c.
gas
d.
liquid
16.
Because of all its water, Earth is nicknamed the _____________.
a.
blue planet
b.
wet planet
c.
dense planet
d.
spherical planet
17.
Molarity equals ______________________.
a.
moles of solute per liter of solution
b.
grams of solute per gram of solution
c.
grams of solute per liter of solution
d.
liters of solute per kilogram of solution
18.
Which of the following molecules can form hydrogen bonds?
a.
NaH3
b.
CH3
c.
NH3
d.
BaH3
19.
Because of its ________________, a large body of water helps moderate the temperature of the surrounding area.
a.
low density
b.
boiling point
c.
low specific heat
d.
high specific heat
20.
How many grams of NaCl are dissolved in 500.0 mL of a 0.05M solution of NaCl?
a.
0.29 g
b.
2.92 g
c.
0.05 g
d.
1.46 g
21.
Your body is about __________ water by weight.
a.
90%
b.
75%
c.
10%
d.
60%
22.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
6.2
b.
0.015 M
c.
1.1 M
d.
0.75 M
23.
The water molecule is polar partly because of its _____________.
a.
volume
b.
mass
c.
weight
d.
geometry
24.
Ice is ___________ liquid water.
a.
more fluid
b.
more massive
c.
less dense
d.
equally as dense as
25.
Regarding solvents and solvents, ________________.
a.
nonpolar solvents dissolve polar solutes
b.
polar solvents dissolve nonpolar solutes
c.
like dissolves like
d.
solutes dissolve solvents
