Question 1

A solution contains 15 ppm of benzene. The density of the solution is 1.00 g/mL. This means that ________.

Accepted Answer

A) there are 15 mg of benzene in 1.0 g of this solution 
B) 100 g of the solution contains 15 g of benzene 
C) 1.0 g of the solution contains 15 × 10-6 g of benzene 
D) 1.0 L of the solution contains 15 g of benzene 
E) the solution is 15% by mass of benzene 
A) there are 15 mg of benzene in 1.0 g of this solution 
B) 100 g of the solution contains 15 g of benzene 
C) 1.0 g of the solution contains 15 × 10-6 g of benzene 
D) 1.0 L of the solution contains 15 g of benzene 
E) the solution is 15% by mass of benzene

Question 2

The concentration of lead nitrate (Pb(NO3)2)in a 0.926 M solution is ________ molal. The density of the solution is 1.202 g/mL.

Accepted Answer

A) 0.770 
B) 2.13 
C) 1.03 
D) 0.819 
E) 0.650 
A) 0.770 
B) 2.13 
C) 1.03 
D) 0.819 
E) 0.650

Question 3

The ideal value of i (van't Hoff factor)for Na3PO4 is:

Accepted Answer

A) 4 
B) 3 
C) 2 
D) 1 
E) 5 
A) 4 
B) 3 
C) 2 
D) 1 
E) 5

Question 4

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 in this solution is ________ molal.

Accepted Answer

A) 0.214 
B) 0.569 
C) 5.70 
D) 63.2 
E) 1.76 
A) 0.214 
B) 0.569 
C) 5.70 
D) 63.2 
E) 1.76

Question 5

The concentration of KBr in a solution prepared by dissolving 2.10 g of KBr in 897 g of water is ________ molal.

Accepted Answer

A) 2.46 
B) 0.0000207 
C) 0.0197 
D) 0.0167 
E) 0.0186 
A) 2.46 
B) 0.0000207 
C) 0.0197 
D) 0.0167 
E) 0.0186

Question 6

The concentration of a benzene solution prepared by mixing 15.0 g C6H6 with 38.0 g CCl4 is ________ molal.

Accepted Answer

A) 5.05 
B) 2.40 
C) 0.622 
D) 0.395 
E) 0.508 
A) 5.05 
B) 2.40 
C) 0.622 
D) 0.395 
E) 0.508

Question 7

If the partial pressure of oxygen in the air a diver breathes is too great, ________.

Accepted Answer

A) respiratory tissue is damaged by oxidation 
B) hyperventilation results 
C) the urge to breathe is increased and excessive CO2 is removed from the body 
D) the urge to breathe is reduced and not enough CO2 is removed from the body 
E) No problems result from this situation. 
A) respiratory tissue is damaged by oxidation 
B) hyperventilation results 
C) the urge to breathe is increased and excessive CO2 is removed from the body 
D) the urge to breathe is reduced and not enough CO2 is removed from the body 
E) No problems result from this situation.

Question 8

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 9

The ratio of the actual value of a colligative property to the value calculated, assuming the substance to be a nonelectrolyte, is referred to as ________.

Accepted Answer

A) Henry's law 
B) vapor pressure lowering 
C) the van't Hoff factor 
D) freezing point depression 
E) osmotic pressure 
A) Henry's law 
B) vapor pressure lowering 
C) the van't Hoff factor 
D) freezing point depression 
E) osmotic pressure

Question 10

A solution is made by dissolving 4.92 g of glucose (C6H12O6)in to 165 mL of water. The molality of this solution is ________ m, if the density of water is 1.00 g/mL.

Accepted Answer

A) 0.165 
B) 0.331 
C) 0.0827 
D) 29.8 
E) 0.00450 
A) 0.165 
B) 0.331 
C) 0.0827 
D) 29.8 
E) 0.00450

Question 11

A solution is prepared by dissolving 15.0 g of NH3 in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH3 in the solution is ________ M.

Accepted Answer

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

Question 12

Which produces the greatest number of ions when one mole dissolves in water?

Accepted Answer

A) Na3PO4 
B) KBr 
C) NaMnO4 
D) NH4Cl 
E) glucose 
A) Na3PO4 
B) KBr 
C) NaMnO4 
D) NH4Cl 
E) glucose

Question 13

Which of the following substances is least likely to dissolve in water?

Accepted Answer

A) HOCH2CH2OH 
B) CHCl3 
C)  O   CH3(CH2)9CH 
D) CH3(CH2)8CH2OH 
E) CCl4 
A) HOCH2CH2OH 
B) CHCl3 
C)  O   CH3(CH2)9CH 
D) CH3(CH2)8CH2OH 
E) CCl4

Question 14

A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of -3.33 °C. Given Kf = 1.86 °C/m for water, the molar mass of the unknown liquid is ________ g/mol.

Accepted Answer

A) 69.0 
B) 333 
C) 619 
D) 161 
E) 62.1 
A) 69.0 
B) 333 
C) 619 
D) 161 
E) 62.1

Question 15

The mole fraction of He in a gaseous solution prepared from 1.0 g of He, 6.5 g of Ar, and 10.0 g of Ne is ________.

Accepted Answer

A) 0.28 
B) 0.25 
C) 0.20 
D) 0.66 
E) 0.86 
A) 0.28 
B) 0.25 
C) 0.20 
D) 0.66 
E) 0.86

Question 16

Which one of the following substances is more likely to dissolve in CCl4?

Accepted Answer

A) CBr4 
B) HBr 
C) HCl 
D) CH3CH2OH 
E) NaCl 
A) CBr4 
B) HBr 
C) HCl 
D) CH3CH2OH 
E) NaCl

Question 17

After swimming in the ocean for several hours, swimmers noticed that their fingers appeared to be very wrinkled. This is an indication that seawater is supertonic relative to the fluid in cells.

Accepted Answer

A) True 
 B)False

Question 18

For a dilute aqueous solution, a concentration of 1 ppm also corresponds to a concentration of 1 ________ per liter of solution.

Accepted Answer

The answer of For a dilute aqueous solution, a concentration...

Question 19

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39 g of H2O is ________.

Accepted Answer

A) 0.58 
B) 0.37 
C) 0.13 
D) 0.11 
E) 9.1 
A) 0.58 
B) 0.37 
C) 0.13 
D) 0.11 
E) 9.1

Question 20

The concentration of a solution of lithium chlorite dissolved in water is 12.5% by mass. In a ________ g sample of this solution, there are 52.5 g of water.

Accepted Answer

A) 60.0 
B) 45.9 
C) 0.00600 
D) 23.8 
E) 1.67 
A) 60.0 
B) 45.9 
C) 0.00600 
D) 23.8 
E) 1.67

Exam 13: Properties of Solutions

A solution contains 15 ppm of benzene. The density of the solution is 1.00 g/mL. This means that ________.

The concentration of lead nitrate (Pb(NO3)2)in a 0.926 M solution is ________ molal. The density of the solution is 1.202 g/mL.

The ideal value of i (van't Hoff factor)for Na3PO4 is:

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 in this solution is ________ molal.

The concentration of KBr in a solution prepared by dissolving 2.10 g of KBr in 897 g of water is ________ molal.

The concentration of a benzene solution prepared by mixing 15.0 g C6H6 with 38.0 g CCl4 is ________ molal.

If the partial pressure of oxygen in the air a diver breathes is too great, ________.

Which one of the following vitamins is water soluble?

The ratio of the actual value of a colligative property to the value calculated, assuming the substance to be a nonelectrolyte, is referred to as ________.

A solution is made by dissolving 4.92 g of glucose (C6H12O6)in to 165 mL of water. The molality of this solution is ________ m, if the density of water is 1.00 g/mL.

A solution is prepared by dissolving 15.0 g of NH3 in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH3 in the solution is ________ M.

Which produces the greatest number of ions when one mole dissolves in water?

Which of the following substances is least likely to dissolve in water?

A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of -3.33 °C. Given Kf = 1.86 °C/m for water, the molar mass of the unknown liquid is ________ g/mol.

The mole fraction of He in a gaseous solution prepared from 1.0 g of He, 6.5 g of Ar, and 10.0 g of Ne is ________.

Which one of the following substances is more likely to dissolve in CCl4?

After swimming in the ocean for several hours, swimmers noticed that their fingers appeared to be very wrinkled. This is an indication that seawater is supertonic relative to the fluid in cells.

For a dilute aqueous solution, a concentration of 1 ppm also corresponds to a concentration of 1 ________ per liter of solution.

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39 g of H2O is ________.

The concentration of a solution of lithium chlorite dissolved in water is 12.5% by mass. In a ________ g sample of this solution, there are 52.5 g of water.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The concentration of lead nitrate (Pb(NO₃)₂)in a 0.926 M solution is ________ molal. The density of the solution is 1.202 g/mL.

The ideal value of i (van't Hoff factor)for Na₃PO₄ is:

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 in this solution is ________ molal.

The concentration of a benzene solution prepared by mixing 15.0 g C₆H₆ with 38.0 g CCl₄ is ________ molal.

A solution is made by dissolving 4.92 g of glucose (C₆H₁₂O₆)in to 165 mL of water. The molality of this solution is ________ m, if the density of water is 1.00 g/mL.

A solution is prepared by dissolving 15.0 g of NH₃ in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH₃ in the solution is ________ M.

A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of -3.33 °C. Given K_f = 1.86 °C/m for water, the molar mass of the unknown liquid is ________ g/mol.

Which one of the following substances is more likely to dissolve in CCl₄?

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39 g of H₂O is ________.