[Skip Breadcrumb Navigation]
:
[Skip Breadcrumb Navigation]
Home
Chapter 11: Solutions and Their Properties
Problem Solving Center
Self Quiz 2
Self Quiz 2
This activity contains 20 questions.
Which combination
cannot
be a solution?
solid in solid
gas in liquid
liquid in solid
liquid in gas
gas in solid
Which interaction would explain why acetic acid, CH
3
COOH, dissolves in H
2
O?
ion-ion interactions
ion-dipole interactions
H-bonding
dispersion forces
covalent bonding
Which combination of changes in enthalpy, changes in entropy, and temperature does
not
result in the spontaneous dissolution of a substance?
Small negative enthalpy of solution, small positive entropy of solution, and high temperature do
not
result in the spontaneous dissolution of a substance.
Large positive enthalpy of solution, small positive entropy of solution, and low temperature do
not
result in the spontaneous dissolution of a substance.
Large negative enthalpy of solution, small negative entropy of solution, and low temperature do
not
result in the spontaneous dissolution of a substance.
Small negative enthalpy of solution, small positive entropy of solution, and low temperature do
not
result in the spontaneous dissolution of a substance.
Large negative enthalpy of solution, large positive entropy of solution, and high temperature do
not
result in the spontaneous dissolution of a substance.
What mass of water is in a solution that decreases in temperature from 25.0 to 20.0 when 2.00 g of NH
4
Cl are added? (The enthalpy of solution is 14.8 kJ/mol, and the specific heat of the solution is assumed to be 4.18 J/g·K.)
28.1 g
28.4 g
26.4 g
24.5 g
26.1 g
What is the weight percent of sodium sulfate in an aqueous solution having X
sodium sulfate
= 0.0200?
15.8 %
16.1 %
11.9 %
13.9 %
13.6 %
What is the weight percent of a 0.554 M K
2
SO
4
solution, which has a density of 1.072 g/mL?
9.00 %
8.26 %
9.89 %
6.99 %
10.3 %
As a general rule, the solubility of ____________ as the temperature _______________.
miscible liquids decrease, decreases
gases decrease, increases
gases increase, increases
molecular solids decrease, increases
ionic solids increase, decreases
What mass of N
2
is dissolved in 6.0 L of water at 1.0 atm total pressure if the Henry's law constant for N
2
at 25 °C is approximately 6.7 x 10
-4
M/atm and P
nitrogen
= 5.90 x 10
2
mm Hg?
66 g
8.7 x 10
-2
g
0.11 g
4.4 x 10
-2
g
1.5 x 10
-2
g
As the number of nonvolatile solute particles increases,
the vapor pressure of a solution increases.
the freezing point of a solution increases.
the solubility of the solute decreases.
the osmotic pressure of a solution decreases.
the boiling point of a solution increases.
Which pair of solutions will
not
have similar colligative properties?
0.200 M NaCl and 0.100 M Na
3
PO
4
0.100 m C
7
H
6
O and 0.100 m C
12
H
22
O
11
5.00 wt % LiCl in water and 5.00 wt % NaCl in water
1.00 M KCl and 0.400 M Ca
3
(PO
4
)
2
0.100 M LiBr and 0.200 M C
6
H
12
O
6
What is the vapor pressure (in mm Hg) of a solution at 25 °C made from 1.00 g of naphthalene (C
10
H
8
) dissolved in 10.0 g of cyclohexane (C
6
H
12
)? (The vapor pressure of pure cyclohexane is 97.5 mm Hg at 25 °C.)
8.86 mm Hg
6.00 mm Hg
91.5 mm Hg
88.6 mm Hg
104 mm Hg
The vapor pressure (in mm Hg) of a solution containing 25.0 g of water and 75.0 g of methanol (CH
4
O) at 25 °C is (The vapor pressure of water at 25 °C is 23.8 mm Hg, while the vapor pressure of methanol is 126.8 mm Hg at 25 °C.)
101 mm Hg.
330 mm Hg.
140 mm Hg.
88.4 mm Hg.
62.1 mm Hg.
Which solution of volatile substances does
not
have the same overall vapor pressure as the rest of the solutions at 25 °C? (The vapor pressure of hexane (C
6
H
14
) is 151.5 mm Hg at 25 °C, while the vapor pressure of heptane (C
7
H
16
) is 45.7 mm Hg at 25 °C.)
0.25 mole hexane and 0.50 mole heptane
10.0 g hexane and 23.2 g heptane
0.60 mole hexane and 1.80 mole heptane
1.00 mole hexane and 2.00 mole heptane
4.00 g hexane and 8.00 g heptane
The solution that has the highest predicted boiling point is (The K
b
value for water is 0.51 (°C·kg)/mol.)
0.400 m MgCl
2
.
0.200 m Na
3
PO
4
.
1.00 m C
6
H
12
O
6
.
1.00 m C
12
H
22
O
11
.
0.500 m NaCl.
The K
f
value for ethylene glycol if a solution prepared by dissolving 0.75 g of citric acid (C
6
H
8
O
7
) in 10.0 g of ethylene glycol (C
2
H
6
O
2
) has a freezing point of -14.2 °C is (The normal freezing point of ethylene glycol is -13.0 °C.)
3.1 (°C·kg)/mol.
0.47 (°C·kg)/mol.
0.32 (°C·kg)/mol.
50 (°C·kg)/mol.
0.016 (°C·kg)/mol.
The predicted boiling point of a solution prepared by dissolving 5.00 g of calcium nitrate in 20.0 g of water is (The K
b
value for water is 0.51 (°C·kg)/mol.)
101.25 °C.
100.78 °C.
102.50 °C.
102.33 °C.
100.05 °C.
Which statement is
not
true concerning the process of osmosis?
Only solvent molecules pass through the semipermeable membrane.
The initial net movement of solvent is from a region of high vapor pressure to a region of low vapor pressure.
The solvent moves in the direction across the semipermeable membrane, which results in a lower entropy.
The initial net movement of solvent is from a region of high solvent concentration to a region of low solvent concentration.
During the process of osmosis, the solvent particles move in both directions through the semipermeable membrane.
The osmotic pressure (in atmospheres) of a solution prepared by adding 2.00 g of magnesium chloride to enough water to make 50.0 mL of solution at 11 °C is
1.1 atm.
29.4 atm.
31.2 atm.
9.79 atm.
0.38 atm.
The molar mass of novocaine if a solution containing a 1.00-g sample of novocaine in 50.0 g of cyclohexanol has a melting point of 21.83 °C is (The melting point of pure cyclohexanol is 25.40 °C, and the K
f
value is 42.2 (°C·kg)/mol.)
2.60 x 10
3
g/mol.
142 g/mol.
236 g/mol.
38.7 g/mol.
2.36 x 10
3
g/mol.
The molar mass of saccharin if 4.00 x 10
2
mL of an aqueous solution containing 0.100 g saccharin at 28.0 °C has an osmotic pressure of 25.5 mm Hg is
1.84 x 10
3
g/mol.
3.24 g/mol.
17.1 g/mol.
0.242 g/mol.
184 g/mol.
The Submit Answers for Grading feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.
So, the Submit Answers for Grading button below will not work.
The following Submit Answers for Grading button is provided in its place and will clear your answers:
The Clear Answers and Start Over feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.
So, the Clear Answers and Start Over button below will not work.
The following Clear Answers button is provided in its place and will clear your answers:
Your browser either does not support scripting or you have turned scripting off. Because of this, the answer choices will NOT appear in a different order each time the page is loaded, though that is mentioned below. Note that you do not need this feature to use this site.
Answer choices in this exercise appear in a different order each time the page
is loaded.
Copyright © 1995 - 2010
Pearson Education
. All rights reserved. Pearson Prentice Hall is an imprint of
Pearson
.
Legal Notice
|
Privacy Policy
|
Permissions
[Return to the Top of this Page]
: [Return to the Top of this Page]
