Water and Its Solutions
Practice Test
1.
Because of its ________________, a large body of water helps moderate the temperature of the surrounding area.
a.
low specific heat
b.
low density
c.
boiling point
d.
high specific heat
2.
Water forms ______________ in a glass tube.
a.
hydrogen and oxygen
b.
a concave meniscus
c.
a convex meniscus
d.
heavy water
3.
Your body is about __________ water by weight.
a.
60%
b.
90%
c.
10%
d.
75%
4.
Driven by concentration difference, the movement of molecules through a semipermeable memebrane is called ___________.
a.
osmosis
b.
reverse movement
c.
boiling
d.
capillarity
5.
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.
0.75 M
d.
1.1 M
6.
The water molecule is polar partly because of its _____________.
a.
geometry
b.
volume
c.
weight
d.
mass
7.
What is the molarity of a solution prepared by dissolving 50.0 g of NaCl to make 500.0 mL of solution?
a.
0.100 M
b.
1.17 M
c.
0.855 M
d.
1.71 M
8.
Ice is ___________ liquid water.
a.
less dense
b.
more massive
c.
equally as dense as
d.
more fluid
9.
A ________________ solution contains more than the usual maximum amount of solute.
a.
dilute
b.
supersaturated
c.
concentrated
d.
saturated
10.
Atoms of this element do NOT participate in hydrogen bonding.
a.
silicon
b.
fluorine
c.
oxygen
d.
nitrogen
11.
Capillarity accounts for the rising of liquids in ___________________.
a.
oceans
b.
rivers
c.
soda bottles
d.
narrow tubes
12.
A solution that contains very little solute is described as ____________.
a.
massive
b.
concentrated
c.
dilute
d.
saturated
13.
The polarity of the water molecule accounts for water's ________________.
a.
unusually high mass
b.
formula
c.
unusually low melting point
d.
unusually high boiling point
14.
The attractions between water molecules are called ________________.
a.
ionic bonding
b.
covalent bonding
c.
weak bonding
d.
hydrogen bonding
15.
Regarding solvents and solvents, ________________.
a.
like dissolves like
b.
solutes dissolve solvents
c.
polar solvents dissolve nonpolar solutes
d.
nonpolar solvents dissolve polar solutes
16.
Molarity equals ______________________.
a.
grams of solute per gram of solution
b.
grams of solute per liter of solution
c.
liters of solute per kilogram of solution
d.
moles of solute per liter of solution
17.
Water forms drops because of its ________________.
a.
polarity
b.
surface tension
c.
mass
d.
volume
18.
The atoms in the water molecule are linked by ___________ bonds.
a.
pure covalent
b.
triple
c.
ionic
d.
polar covalent
19.
How many grams of NaCl are dissolved in 500.0 mL of a 0.05M solution of NaCl?
a.
0.29 g
b.
1.46 g
c.
0.05 g
d.
2.92 g
20.
A solute __________________ of the solvent.
a.
lowers the boiling point
b.
does not affect
c.
raises the freezing point
d.
raises the boiling point
21.
Hard water contains significant concentrations of these.
a.
chloride ions
b.
iron atoms
c.
sodium ions
d.
calcium and magnesium ions
22.
Because of all its water, Earth is nicknamed the _____________.
a.
spherical planet
b.
blue planet
c.
dense planet
d.
wet planet
23.
The bond angle in the water molecule is about __________.
a.
105
o
b.
45
o
c.
90
o
d.
180
o
24.
Which of the following molecules can form hydrogen bonds?
a.
NaH3
b.
NH3
c.
CH3
d.
BaH3
25.
H
2
O is most dense at __________.
a.
32
o
F
b.
0
o
C
c.
277 K
d.
-32 K
