Question 1

What is the molality of a 35.0% (by mass)aqueous solution of nitric acid?

Accepted Answer

A) 348 
B) 1.42 
C) 8.55 
D) 2.15 
E) The density of the solution is needed to solve the problem. 
A) 348 
B) 1.42 
C) 8.55 
D) 2.15 
E) The density of the solution is needed to solve the problem.

Question 2

Which of the following liquids will have the highest freezing point?

Accepted Answer

A) pure H2O 
B) aqueous glucose (0.050 m) 
C) aqueous CoI2 (0.030 m) 
D) aqueous FeI3 (0.030 m) 
E) aqueous NaI (0.030 m) 
A) pure H2O 
B) aqueous glucose (0.050 m) 
C) aqueous CoI2 (0.030 m) 
D) aqueous FeI3 (0.030 m) 
E) aqueous NaI (0.030 m)

Question 3

What is the freezing point (°C)of a solution prepared by dissolving 11.3 g of Ca(NO3)2   in 115 g of water? The molal freezing point depression constant for water is   (Assume 100% ionization of Ca(NO3)2.)

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

Question 4

Of the following,a 0.1 M aqueous solution of ________ will have the highest freezing point.

Accepted Answer

A) NaCl 
B) Al(NO3)3 
C) K2CrO4 
D) Na2SO4 
E) sucrose 
A) NaCl 
B) Al(NO3)3 
C) K2CrO4 
D) Na2SO4 
E) sucrose

Question 5

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 6

George is making spaghetti for dinner.He places 4.01 kg of water in a pan and brings it to a boil.Before adding the pasta,he adds 58 g of table salt (NaCl)to the water and again brings it to a boil.The temperature of the salty,boiling water is ________°C.(Assume 100% ionization of NaCl.) Assume a pressure of 1.00 atm and negligible evaporation of water.Kb for water is

Accepted Answer

A) 99.87 
B) 100.26 
C) 100.13 
D) 99.74 
E) 100.00 
A) 99.87 
B) 100.26 
C) 100.13 
D) 99.74 
E) 100.00

Question 7

What is the molality (m)of a solution containing 5.16 g of C6H12O6 in   of water? The density of water is

Accepted Answer

A) 0.313 
B) 0.156 
C) 0.0782 
D) 28.2 
E) 0.00524 
A) 0.313 
B) 0.156 
C) 0.0782 
D) 28.2 
E) 0.00524

Question 8

What is the vapor pressure (mm Hg)of water at   above a solution prepared by dissolving   of urea,CO(NH2)2,in   of water? The vapor pressure of pure water at 25 °C is 23.8 mm Hg.

Accepted Answer

A) 22 
B) 2.9 
C) 0.42 
D) 27 
E) 0.91 
A) 22 
B) 2.9 
C) 0.42 
D) 27 
E) 0.91

Question 9

A solution is prepared by dissolving 24.7 g of KBr in 375 g water at 20.0 °C.What is the molarity (M)of KBr in this solution? Density of the solution at 20.0 °C is 0.998 g/mL.

Accepted Answer

A) 0.552 
B) 0.0659 
C) 0.000552 
D) 552 
E) 65.9 
A) 0.552 
B) 0.0659 
C) 0.000552 
D) 552 
E) 65.9

Question 10

The most likely van't Hoff factor for an 0.01 m CaI2 solution is ________.

Accepted Answer

A) 1.00 
B) 3.00 
C) 1.27 
D) 2.69 
E) 3.29 
A) 1.00 
B) 3.00 
C) 1.27 
D) 2.69 
E) 3.29

Question 11

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

Accepted Answer

A) 96 
B) 6.8 
C) 0.68 
D) 6.3 
E) 0.11 
A) 96 
B) 6.8 
C) 0.68 
D) 6.3 
E) 0.11

Question 12

Hydrophobic colloids ________.

Accepted Answer

A) are those that contain water 
B) can be stabilized by adsorption of ions 
C) are those that do not contain water 
D) can be stabilized by coagulation 
E) will separate into two phases if they are stabilized 
A) are those that contain water 
B) can be stabilized by adsorption of ions 
C) are those that do not contain water 
D) can be stabilized by coagulation 
E) will separate into two phases if they are stabilized

Question 13

The solubility of Ar in water at 25 °C is 1.6 × 10-3 M when the pressure of the Ar above the solution is 1.0 atm.The solubility of Ar at a pressure of 2.5 atm is ________ M.

Accepted Answer

A) 1.6 × 103 
B) 6.4 × 10-4 
C) 4.0 × 10-3 
D) 7.5 × 10-2 
E) 1.6 × 10-3 
A) 1.6 × 103 
B) 6.4 × 10-4 
C) 4.0 × 10-3 
D) 7.5 × 10-2 
E) 1.6 × 10-3

Question 14

How many grams of solution are present if there is   of dissolved solute which is 15.6% by mass?

Accepted Answer

A) 43.2 
B) 0.177 
C) 1770 
D) 5.64 
E) 0.0564 
A) 43.2 
B) 0.177 
C) 1770 
D) 5.64 
E) 0.0564

Question 15

The solubility of oxygen gas in water at 25 °C and 1.0 atm pressure of oxygen is   The solubility of oxygen in water at 4.0 atm and 25 °C is ________ g/L.

Accepted Answer

A) 0.041 
B) 0.014 
C) 0.31 
D) 0.16 
E) 4.0 
A) 0.041 
B) 0.014 
C) 0.31 
D) 0.16 
E) 4.0

Question 16

A 0.100 m solution of which one of the following solutes will have the highest vapor pressure?

Accepted Answer

A) KClO4 
B) Ca(ClO4)2 
C) Al(ClO4)3 
D) sucrose 
E) NaCl 
A) KClO4 
B) Ca(ClO4)2 
C) Al(ClO4)3 
D) sucrose 
E) NaCl

Question 17

The principal reason for the extremely low solubility of NaCl in benzene (C6H6)is the ________.

Accepted Answer

A) strong solvent-solvent interactions 
B) hydrogen bonding in C6H6 
C) strength of the covalent bond in NaCl 
D) weak solvation of Na+ and Cl- by C6H6 
E) increased disorder due to mixing of solute and solvent 
A) strong solvent-solvent interactions 
B) hydrogen bonding in C6H6 
C) strength of the covalent bond in NaCl 
D) weak solvation of Na+ and Cl- by C6H6 
E) increased disorder due to mixing of solute and solvent

Question 18

Which of the following will have an ideal van't Hoff factor (i)value of 1?

Accepted Answer

A) sucrose 
B) NaF 
C) LiNO3 
D) NH4NO3 
E) Li2PO4 
A) sucrose 
B) NaF 
C) LiNO3 
D) NH4NO3 
E) Li2PO4

Question 19

Water (H2O)and the alcohol methanol (CH3OH)are infinitely soluble in each other.The primary intermolecular force responsible for this is ________.

Accepted Answer

Question 20

What is the concentration in ppm of a solution which is prepared by dissolving 15 mg of NaCl in 200 mL water?

Accepted Answer

A) 1.5 × 10-5 
B) 75 
C) 0.075 
D) 15 
E) 7.5 × 10-5 
A) 1.5 × 10-5 
B) 75 
C) 0.075 
D) 15 
E) 7.5 × 10-5

Exam 13: Properties of Solutions

What is the molality of a 35.0% (by mass)aqueous solution of nitric acid?

Which of the following liquids will have the highest freezing point?

What is the freezing point (°C)of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is (Assume 100% ionization of Ca(NO3)2.)

Of the following,a 0.1 M aqueous solution of ________ will have the highest freezing point.

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

What is the molality (m)of a solution containing 5.16 g of C6H12O6 in of water? The density of water is

What is the vapor pressure (mm Hg)of water at above a solution prepared by dissolving of urea,CO(NH2)2,in of water? The vapor pressure of pure water at 25 °C is 23.8 mm Hg.

A solution is prepared by dissolving 24.7 g of KBr in 375 g water at 20.0 °C.What is the molarity (M)of KBr in this solution? Density of the solution at 20.0 °C is 0.998 g/mL.

The most likely van't Hoff factor for an 0.01 m CaI2 solution is ________.

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

Hydrophobic colloids ________.

The solubility of Ar in water at 25 °C is 1.6 × 10-3 M when the pressure of the Ar above the solution is 1.0 atm.The solubility of Ar at a pressure of 2.5 atm is ________ M.

How many grams of solution are present if there is of dissolved solute which is 15.6% by mass?

The solubility of oxygen gas in water at 25 °C and 1.0 atm pressure of oxygen is The solubility of oxygen in water at 4.0 atm and 25 °C is ________ g/L.

A 0.100 m solution of which one of the following solutes will have the highest vapor pressure?

The principal reason for the extremely low solubility of NaCl in benzene (C6H6)is the ________.

Which of the following will have an ideal van't Hoff factor (i)value of 1?

Water (H2O)and the alcohol methanol (CH3OH)are infinitely soluble in each other.The primary intermolecular force responsible for this is ________.

What is the concentration in ppm of a solution which is prepared by dissolving 15 mg of NaCl in 200 mL water?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

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

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What is the freezing point (°C)of a solution prepared by dissolving 11.3 g of Ca(NO₃)₂ in 115 g of water? The molal freezing point depression constant for water is (Assume 100% ionization of Ca(NO₃)₂.)

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

What is the molality (m)of a solution containing 5.16 g of C₆H₁₂O₆ in of water? The density of water is

What is the vapor pressure (mm Hg)of water at above a solution prepared by dissolving of urea,CO(NH₂)₂,in of water? The vapor pressure of pure water at 25 °C is 23.8 mm Hg.

The most likely van't Hoff factor for an 0.01 m CaI₂ solution is ________.

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

The solubility of Ar in water at 25 °C is 1.6 × 10^-3 M when the pressure of the Ar above the solution is 1.0 atm.The solubility of Ar at a pressure of 2.5 atm is ________ M.

The principal reason for the extremely low solubility of NaCl in benzene (C₆H₆)is the ________.

Water (H₂O)and the alcohol methanol (CH₃OH)are infinitely soluble in each other.The primary intermolecular force responsible for this is ________.