Chapter 14 and 15 Practice Test
Date:
Name:
1.
The percent by mass of aluminum in Al2 O3 is approximately
A.
2.
B.
35.4
C.
47.1
D. 52.9
Which type of solid does pure water form when it freezes?
A.
3.
18.9
9.
ionic
B.
network
C.
metallic
10.
Many laboratory preparations of solutions call for stirring the
solvent while adding the solute. Which of the following is
always an e ect of this procedure?
It decreases the reactivity of the solute.
B.
It decreases the solubility of the solute.
C.
It brings the solute and solvent rapidly into contact.
11.
7.
B.
24%
C.
39%
12.
D. 61%
1.00
B.
2.00
C.
28.0
D. 112
decreasing the amount of solvent at constant temperature
C.
increasing the amount of solute at constant temperature
If 0.50 liter of a 12-molar solution is diluted to 1.0 liter, the
molarity of the new solution is
2.4
B.
6.0
C.
12
D. 24
When the vapor pressure of a liquid in an open container equals
the atmospheric pressure, the liquid will
A.
freeze
B.
crystallize
C.
melt
D. boil
A.
hydrogen bonds
B.
C.
molecule-ion attractions
D. ion-ion attractions
13.
van der Waals forces
The heat of vaporization of a liquid is 320. calories per gram.
What is the minimum number of calories needed to change 40.0
grams of the liquid to vapor at the boiling point?
8.00
B.
320.
C.
3,280
14.
D. 12,800
Which description applies to a system in a sealed ask that is
half full of water?
A.
Only evaporation occurs, but it eventually stops.
B.
Only condensation occurs, but it eventually stops.
C.
Neither evaporation nor condensation occurs.
A student pours mineral salts into a bottle of cold water. Which
of the following best explains why shaking the bottle will a ect
the dissolving rate of the salt?
A.
Shaking exposes the salts to the solvent more quickly.
B.
Shaking helps more water to evaporate.
C.
Shaking causes more ions to precipitate out of solution.
D. Shaking equalizes the water temperature.
The relatively high boiling point of water is primarily due to the
presence of
A.
8.
19%
How many grams of KOH are needed to prepare 250 milliliters
of a 2.00 M solution of KOH (formula mass = 56:0)?
A.
6.
B.
The approximate percent by mass of potassium in KHCO3 is
A.
5.
decreasing the temperature
A.
D. It produces a double displacement reaction.
4.
A.
D. increasing the temperature
D. molecular
A.
Which will increase the solubility of most solid solutes?
D. Both evaporation and condensation occur.
page 1
The energy required to change a unit mass of a solid to a liquid
at constant temperature is called its heat of
A.
formation
B.
vaporization
C.
combustion
D. fusion
Which graph shown could represent the uniform cooling of a
substance, starting with the gaseous phase and ending with the
solid phase?
A.
B.
C.
D.
15.
What is the molarity of a solution that contains 0.25 mole of
solute in 250 milliliters of solution?
A.
16.
1.0 M
B.
0.025 M
C.
0.50 M
22.
D. 0.75 M
Hydrogen bonding is a type of
A.
strong covalent bond
B.
weak ionic bond
C.
strong intermolecular force
A.
larger molecules
B.
a larger molecular mass
C.
stronger ionic bonds
D. stronger intermolecular forces
23.
D. weak intermolecular force
17.
At 298 K, the vapor pressure of H2 O is less than the vapor
pressure of CS2 . The best explanation for this is that H2 O has
What is the molarity of 1.5 liters of an aqueous solution that
contains 52 grams of lithium uoride, LiF?
A.
The graph shown represents a substance X, in the form of a gas,
uniformly cooled from an initial temperature of 140 C.
24.
In which segment of the graph is substance X in the liquid
phase only?
19.
2.0 M
C.
3.0 M
D. 0.75 M
10
B.
20
C.
30
D. 40
A 10 gram sugar cube and a 10 gram sample of powdered sugar
are placed in two cups with the same volume of water at the
same temperature. Which of the following statements is true?
A.
The sugar cube dissolves faster because it has fewer
molecules.
B.
How many milliliters of 0.100 M NaOH(aq) would be needed to
completely neutralize 50.0 milliliters of 0.300 M HCl(aq)?
The powdered sugar dissolves faster because it has more
surface area.
C.
The sugar cube dissolves faster because of more surface
area.
A.
D. The powdered sugar dissolves faster because it has more
volume.
A.
18.
B.
How many milliliters of 2.5 M HCl are required to exactly
neutralize 15 milliliters of 5.0 M NaOH?
A.
25.
1.3 M
AB
16.7 mL
B.
B.
BC
50.0 mL
C.
C.
CD
150. mL
D. DE
D. 300. mL
Which of the following solutions has the highest concentration
of solute?
A.
1.0 mol solute in 200 mL solvent
B.
2.0 mol solute in 500 mL solvent
C.
3.0 mol solute in 1 L solvent
26.
The chart given shows the change in vapor pressure of four pure
liquids with increasing temperature. Which liquid has the lowest
normal boiling point? (atmospheric pressure is 760 mmHg)
D. 4.0 mol solute in 1.5 L solvent
20.
If a 9.0 milliliter sample of HCl solution exactly neutralizes
6.0 milliliters of a 3.0 M NaOH solution, what is the
concentration of the HCl solution?
A.
21.
1.0 M
B.
2.0 M
C.
1.8 M
A.
D. 1.5 M
27.
As a solid is heated, its temperature increases from 10 C to
25 C, remains at 25 C for 5 minutes, and then increases to
beyond 45 C. Based on this information, what conclusion can
be drawn about the substance?
A.
Its melting point is 45 C.
B.
C.
Its melting point is 25 C.
D. Its boiling point is 25 C.
A
B.
B
C.
C
D. D
Which solution contains the greatest number of moles of solute?
A.
0.5 L of 0.5 M
B.
0.5 L of 2 M
C.
2 L of 0.5 M
D. 2 L of 2 M
Its boiling point is 45 C.
page 2
Chapter 14 and 15 Practice Test
28.
What is the total number of kilocalories of heat needed to change
150 grams of ice to water at 0 C? (Heat of fusion = 80 cal=g)
A.
29.
12
B.
2.0
C.
70
35.
D. 230
If water is allowed to evaporate from an unsaturated saltwater
solution, how will the concentration of the solution change?
A.
The concentration will decrease.
B.
The concentration will rst increase, then decrease.
C.
The concentration will remain the same.
36.
D. The concentration will increase.
30.
Which preparation produces a 2.0 M solution of C6 H12 O6 ?
A.
90.0 g of C6 H12 O6 dissolved in 500.0 mL of solution
B.
90.0 g of C6 H12 O6 dissolved in 1000. mL of solution
C.
180.0 g of C6 H12 O6 dissolved in 500.0 mL of solution
37.
D. 180.0 g of C6 H12 O6 dissolved in 1000. mL of solution
31.
Hydrogen bonds are strongest between molecules of
A.
32.
B.
H2 S(`)
C.
H2 Se(`)
D. H2 Te(`)
1.0 M
B.
4.5 M
C.
3.0 M
39.
D. 6.0 M
increase in temperature
B.
decrease in temperature
C.
change to water at a higher temperature
number of grams of solute
liter of solvent
B.
number of grams of solute
liter of solution
C.
number of moles of solute
liter of solvent
D.
number of moles of solute
liter of solution
A solution that contains less solute than it can hold at a given
temperature is
A.
disassociated.
B.
C.
supersaturated.
D. unsaturated.
40.
saturated.
In the change represented by the equation CO2 (s) ! CO2 (g), the
CO2 (s) is
A.
melting
B.
C.
condensing
D. subliming
freezing
What is the percent by mass of hydrogen in CH3 COOH (formula
mass = 60)?
1.7%
B.
5.0%
C.
6.7%
D. 7.1%
The heat of fusion of a compound is 30.0 calories per gram.
What is the total number of calories of heat that must be
absorbed by a 15.0-gram sample to change the compound from
solid to liquid at its melting point?
A.
The heat fusion for ice is 80 calories per gram. Adding
80 calories of heat to one gram of ice at STP will cause the ice
to
A.
A.
A.
50.0 milliliters of 3.0 M HNO3 completely neutralized
150.0 milliliters of KOH. What was the molarity of the KOH
solution?
A.
33.
H2 O(`)
38.
The molarity (M) of a solution is equal to the
15.0 cal
B.
45.0 cal
C.
150 cal
D. 450 cal
The diagram shown represents the uniform heating of a substance
that is a solid at t0 . What is the freezing point of the substance?
D. change to water at the same temperature
34.
What is the molarity of a solution that contains 40. grams of
NaOH in 0.50 liter of solution?
A.
1.0 M
B.
2.0 M
C.
0.50 M
D. 0.25 M
A.
page 3
1 C
B.
12 C
C.
60 C
D. 100 C
Chapter 14 and 15 Practice Test
41.
Consider this phrase diagram.
42.
This diagram represents a phase diagram for a substance.
At which point do solid, liquid, and gas phases exist in
equilibrium?
A.
What process is occurring when a substance changes from
point X ( 130 C and 50 kPa) to point Y (30 C and 100 kPa)?
A.
boiling
B.
C.
melting
D. sublimation
43.
freezing
1
B.
2
C.
3
D. 4
Using the phase diagram above, boiling occurs between:
A.
1 and 2
B.
2 and 3
C.
3 and 4
D. 4 and 5
44. Using the phase diagram above, what phases are present at point
6?
page 4
A.
liquid only
B.
gas only
C.
solid and liquid
D. liquid and gas
Chapter 14 and 15 Practice Test
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Chapter 14 and 15 Practice Test
12/17/2015
1.
Answer:
D
21.
Answer:
C
2.
Answer:
D
22.
Answer:
D
3.
Answer:
C
23.
Answer:
A
4.
Answer:
C
24.
Answer:
C
5.
Answer:
C
25.
Answer:
B
6.
Answer:
A
26.
Answer:
A
7.
Answer:
D
27.
Answer:
D
8.
Answer:
D
28.
Answer:
A
9.
Answer:
D
29.
Answer:
D
10.
Answer:
B
30.
Answer:
C
11.
Answer:
D
31.
Answer:
A
12.
Answer:
A
32.
Answer:
A
13.
Answer:
D
33.
Answer:
D
14.
Answer:
B
34.
Answer:
B
15.
Answer:
A
35.
Answer:
D
16.
Answer:
C
36.
Answer:
D
17.
Answer:
C
37.
Answer:
D
18.
Answer:
C
38.
Answer:
C
19.
Answer:
A
39.
Answer:
D
20.
Answer:
B
40.
Answer:
B
Teacher's Key
41.
Answer:
C
42.
Answer:
D
43.
Answer:
B
44.
Answer:
D
Page 2