Question 1

Which one of the following vitamins is water soluble?

Accepted Answer

A)  A 
B)  B 
C)  K 
D)  D 
E)  E 
A)  A 
B)  B 
C)  K 
D)  D 
E)  E

Question 2

Adding solute to a solution decreases the vapor pressure of the solution.

Accepted Answer

A) True 
 B)False

Question 3

A sample of potassium chlorate (15.0 g) is dissolved in 201 g of water at 70 °C, with precautions taken to avoid evaporation of any water. The solution is cooled to 30.0 °C and no precipitate is observed. This solution is .

Accepted Answer

A)  unsaturated 
B)  saturated 
C)  miscible 
D)  supersaturated 
E)  hydrated 
A)  unsaturated 
B)  saturated 
C)  miscible 
D)  supersaturated 
E)  hydrated

Question 4

The dissolution of gases in water is virtually always exothermic because _.

Accepted Answer

A)  neither of the two endothermic steps in the solution- formation process is necessary 
B)  one of the two endothermic steps (separation of solute particles) in the solution- formation process is unnecessary 
C)  gases react exothermically with water 
D)  the exothermic step in the solution- formation process is unnecessary 
E)  all three steps in the solution- formation process are exothermic 
A)  neither of the two endothermic steps in the solution- formation process is necessary 
B)  one of the two endothermic steps (separation of solute particles) in the solution- formation process is unnecessary 
C)  gases react exothermically with water 
D)  the exothermic step in the solution- formation process is unnecessary 
E)  all three steps in the solution- formation process are exothermic

Question 5

Which one of the following is most soluble in hexane (C6H14)?

Accepted Answer

A)  CH3CH2CH2OH 
B)  CH3OH 
C)  CH3CH2CH2CH2CH2OH 
D)  CH3CH2CH2CH2OH 
E)  CH3CH2OH 
A)  CH3CH2CH2OH 
B)  CH3OH 
C)  CH3CH2CH2CH2CH2OH 
D)  CH3CH2CH2CH2OH 
E)  CH3CH2OH

Question 6

At 20°C, a 3.54 M aqueous solution of ammonium chloride has a density of 1.0512 g/mL. What is the mass % of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

Accepted Answer

A)  6.95 
B)  4.10 
C)  3.36 
D)  18.00 
E)  0.297 
A)  6.95 
B)  4.10 
C)  3.36 
D)  18.00 
E)  0.297

Question 7

A solution contains 28% phosphoric acid by mass. This means that .

Accepted Answer

A)  1 mL of this solution contains 28 g of phosphoric acid 
B)  the density of this solution is 2.8 g/mL 
C)  1 L of this solution has a mass of 28 g 
D)  100 g of this solution contains 28 g of phosphoric acid 
E)  1 L of this solution contains 28 mL of phosphoric acid 
A)  1 mL of this solution contains 28 g of phosphoric acid 
B)  the density of this solution is 2.8 g/mL 
C)  1 L of this solution has a mass of 28 g 
D)  100 g of this solution contains 28 g of phosphoric acid 
E)  1 L of this solution contains 28 mL of phosphoric acid

Question 8

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is % by mass.

Accepted Answer

A)  6.24 
B)  0.0632 
C)  0.0594 
D)  5.94 
E)  6.32 
A)  6.24 
B)  0.0632 
C)  0.0594 
D)  5.94 
E)  6.32

Question 9

Which of the following cannot be a colloid?

Accepted Answer

A)  a foam 
B)  an aerosol 
C)  an emulsion 
D)  a homogenous mixture 
E)  All of the above are colloids. 
A)  a foam 
B)  an aerosol 
C)  an emulsion 
D)  a homogenous mixture 
E)  All of the above are colloids.

Question 10

The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of
1)01 g/mL is _% by mass.

Accepted Answer

A)  45.3 
B)  7.83 
C)  12.9 
D)  10.1 
E)  2.21 
A)  45.3 
B)  7.83 
C)  12.9 
D)  10.1 
E)  2.21

Question 11

Of the concentration units below, only _ _ is temperature dependent.

Accepted Answer

A)  mass % 
B)  ppb 
C)  ppm 
D)  molality 
E)  molarity 
A)  mass % 
B)  ppb 
C)  ppm 
D)  molality 
E)  molarity

Question 12

A solution with a concentration higher than the solubility is _.

Accepted Answer

A)  is unsaturated 
B)  is supercritical 
C)  is saturated 
D)  is supersaturated 
E)  is not possible 
A)  is unsaturated 
B)  is supercritical 
C)  is saturated 
D)  is supersaturated 
E)  is not possible

Question 13

The largest value of the Henry's Law constant for the liquid solvent H2O will be obtained with Gas as the solute and a temperature of °C.

Accepted Answer

A)  Ar, 11 
B)  C2H4, 45 
C)  CO2, 32 
D)  HCl, 49 
E)  N2, 15 
A)  Ar, 11 
B)  C2H4, 45 
C)  CO2, 32 
D)  HCl, 49 
E)  N2, 15

Question 14

A solution is prepared by dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH3 in the solution is _ _.

Accepted Answer

A)  3.53 
B)  3.24 
C)  0.882 
D)  60.0 
E)  0.00353 
A)  3.53 
B)  3.24 
C)  0.882 
D)  60.0 
E)  0.00353

Question 15

At 20°C, a 2.32 M aqueous solution of ammonium chloride has a density of 1.0344 g/mL. What is the molality of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

Accepted Answer

A)  0.0449 
B)  2.55 
C)  12.00 
D)  0.446 
E)  2.32 
A)  0.0449 
B)  2.55 
C)  12.00 
D)  0.446 
E)  2.32

Question 16

What is the osmotic pressure (in atm) of a 0.040 M solution of a non- electrolyte at 30.0 oC?

Accepted Answer

Question 17

A solution with a solute concentration greater than the solubility is called a supercritical solution.

Accepted Answer

A) True 
 B)False

Question 18

The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of atm.

Accepted Answer

A)  0.367 
B)  0.0918 
C)  0.498 
D)  0.790 
E)  0.413 
A)  0.367 
B)  0.0918 
C)  0.498 
D)  0.790 
E)  0.413

Question 19

Emulsifying agents typically have a hydrophobic end and a hydrophilic end.

Accepted Answer

A) True 
 B)False

Question 20

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2
(formula weight = 164 g/mol) in 115 g of water? The molal freezing point depression constant for water is 1.86 °C/m.

Accepted Answer

A)  - 3.34 
B)  - 1.11 
C)  3.34 
D)  1.11 
E)  0.00 
A)  - 3.34 
B)  - 1.11 
C)  3.34 
D)  1.11 
E)  0.00

Exam 13: Properties of Solutions

Which one of the following vitamins is water soluble?

Adding solute to a solution decreases the vapor pressure of the solution.

A sample of potassium chlorate (15.0 g) is dissolved in 201 g of water at 70 °C, with precautions taken to avoid evaporation of any water. The solution is cooled to 30.0 °C and no precipitate is observed. This solution is .

The dissolution of gases in water is virtually always exothermic because _.

Which one of the following is most soluble in hexane (C6H14)?

At 20°C, a 3.54 M aqueous solution of ammonium chloride has a density of 1.0512 g/mL. What is the mass % of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

A solution contains 28% phosphoric acid by mass. This means that .

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is % by mass.

Which of the following cannot be a colloid?

The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of 1)01 g/mL is _% by mass.

Of the concentration units below, only _ _ is temperature dependent.

A solution with a concentration higher than the solubility is _.

The largest value of the Henry's Law constant for the liquid solvent H2O will be obtained with Gas as the solute and a temperature of °C.

A solution is prepared by dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH3 in the solution is _ _.

At 20°C, a 2.32 M aqueous solution of ammonium chloride has a density of 1.0344 g/mL. What is the molality of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

What is the osmotic pressure (in atm) of a 0.040 M solution of a non- electrolyte at 30.0 oC?

A solution with a solute concentration greater than the solubility is called a supercritical solution.

The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of atm.

Emulsifying agents typically have a hydrophobic end and a hydrophilic end.

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 (formula weight = 164 g/mol) in 115 g of water? The molal freezing point depression constant for water is 1.86 °C/m.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

Filters

Which one of the following is most soluble in hexane (C₆H₁₄)?

At 20°C, a 3.54 M aqueous solution of ammonium chloride has a density of 1.0512 g/mL. What is the mass % of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

A solution is prepared by dissolving 23.7 g of CaCl₂in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl₂is % by mass.

The largest value of the Henry's Law constant for the liquid solvent H₂O will be obtained with Gas as the solute and a temperature of °C.

A solution is prepared by dissolving 15.0 g of NH₃in 250 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH₃in the solution is _ _.

At 20°C, a 2.32 M aqueous solution of ammonium chloride has a density of 1.0344 g/mL. What is the molality of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

What is the osmotic pressure (in atm) of a 0.040 M solution of a non- electrolyte at 30.0 ^oC?

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO₃)₂ (formula weight = 164 g/mol) in 115 g of water? The molal freezing point depression constant for water is 1.86 °C/m.