Question 1

How many grams of KBr are required to make 350.mL of a 0.115 mol L-1 KBr aqueous solution?

Accepted Answer

A) 0.338 g 
B) 3.04 g 
C) 4.79 g 
D) 40.3 g 
A) 0.338 g 
B) 3.04 g 
C) 4.79 g 
D) 40.3 g

Question 2

A solid solution of zinc in copper is an example of:

Accepted Answer

A) a solvent 
B) a solute 
C) the U.S.five-cent nickel 
D) a non-uniform solute 
E) an alloy 
A) a solvent 
B) a solute 
C) the U.S.five-cent nickel 
D) a non-uniform solute 
E) an alloy

Question 3

The vapor pressures of pure hexane and pure heptane at 25 °C are 151.4 mmHg and 45.62 mmHg respectively.A solution contains 0.800 mol fraction n-hexane and 0.200 mol fraction n-heptane.What is the composition of the vapor in equilibrium with this solution at 25 °C?

Accepted Answer

A) 80.0% hexane,20.0% heptane 
B) 50.0% hexane,50.0% heptane 
C) 77.0% hexane,23.0% heptane 
D) 45.0% hexane,55.0% heptane 
E) 93.0% hexane,7.0% heptane 
A) 80.0% hexane,20.0% heptane 
B) 50.0% hexane,50.0% heptane 
C) 77.0% hexane,23.0% heptane 
D) 45.0% hexane,55.0% heptane 
E) 93.0% hexane,7.0% heptane

Question 4

A crystal is placed into a solution and the solution seems to solidify while getting much warmer at the same time.The solution must have been:

Accepted Answer

A) supersaturated 
B) dilute 
C) saturated 
D) unsaturated 
E) concentrated 
A) supersaturated 
B) dilute 
C) saturated 
D) unsaturated 
E) concentrated

Question 5

The freezing point of a solution made by dissolving 8.9 g of MgCl2 in 98 g H2O is -4.3 °C.Kf for water is 1.86 °C m-1.The van't Hoff i factor for this solution is ________.

Accepted Answer

A) 1.2 
B) 2.7 
C) 2.4 
D) 2.0 
E) 3.0 
A) 1.2 
B) 2.7 
C) 2.4 
D) 2.0 
E) 3.0

Question 6

A saturated solution of ammonium sulfate, (NH4)2SO4,in water at 30 °C contains 78.0 g (NH4)2SO4 per 100.0 g H2O.What is the molality of this solution?

Accepted Answer

A) 0.780 m 
B) 1.69 m 
C) 0.590 m 
D) 0.0590 m 
E) 5.90 m 
A) 0.780 m 
B) 1.69 m 
C) 0.590 m 
D) 0.0590 m 
E) 5.90 m

Question 7

What is the expected freezing point of a 0.50 mol kg-1 solution of Li2SO4 in water? Kf for water is 1.86 °C m-1.

Accepted Answer

A) -0.93 °C 
B) -1.9 °C 
C) -2.8 °C 
D) -6.5 °C 
A) -0.93 °C 
B) -1.9 °C 
C) -2.8 °C 
D) -6.5 °C

Question 8

Henry's Law states that:

Accepted Answer

A) a supersaturated solution is unstable 
B) the solubility of a gas increases as the gas pressure is increased 
C) the solubility of a gas decreases as the gas pressure is increased 
D) a concentrated solution lowers the freezing point of a solution 
E) a concentrated solution increases the boiling point of a solution 
A) a supersaturated solution is unstable 
B) the solubility of a gas increases as the gas pressure is increased 
C) the solubility of a gas decreases as the gas pressure is increased 
D) a concentrated solution lowers the freezing point of a solution 
E) a concentrated solution increases the boiling point of a solution

Question 9

To make a 0.500 mol L-1 solution,one could take 0.500 moles of solute and add:

Accepted Answer

A) 1.00 L of solvent 
B) 1.00 kg of solvent 
C) enough solvent to make 1.00 L of solution 
D) enough solvent to make 1.00 kg of solution 
A) 1.00 L of solvent 
B) 1.00 kg of solvent 
C) enough solvent to make 1.00 L of solution 
D) enough solvent to make 1.00 kg of solution

Question 10

Which of the following solutions will have the lowest freezing point?

Accepted Answer

A) 0.010 mol kg-1 K Br 
B) 0.010 mol kg-1 Na2CO3 
C) 0.035 mol kg-1 CH3CH2OH  
D) 0.015 mol kg-1 BaCl2 
A) 0.010 mol kg-1 K Br 
B) 0.010 mol kg-1 Na2CO3 
C) 0.035 mol kg-1 CH3CH2OH  
D) 0.015 mol kg-1 BaCl2

Question 11

A solution is prepared by adding 1.43 mol of KCl to 889 g of water.The concentration of KCl is ________ mol kg-1.

Accepted Answer

A) 1.61 × 10-3 
B) 622 
C) 0.622 
D) 1.27 × 103 
E) 1.61 
A) 1.61 × 10-3 
B) 622 
C) 0.622 
D) 1.27 × 103 
E) 1.61

Question 12

Molality is independent of temperature,molarity is dependent on temperature.

Accepted Answer

A) True 
 B)False

How many grams of KBr are required to make 350.mL of a 0.115 mol L^-1 KBr aqueous solution?

A solid solution of zinc in copper is an example of:

The vapor pressures of pure hexane and pure heptane at 25 °C are 151.4 mmHg and 45.62 mmHg respectively.A solution contains 0.800 mol fraction n-hexane and 0.200 mol fraction n-heptane.What is the composition of the vapor in equilibrium with this solution at 25 °C?

A crystal is placed into a solution and the solution seems to solidify while getting much warmer at the same time.The solution must have been:

The freezing point of a solution made by dissolving 8.9 g of MgCl₂ in 98 g H₂O is -4.3 °C.K_f for water is 1.86 °C m^-1.The van't Hoff i factor for this solution is ________.

A saturated solution of ammonium sulfate, (NH₄)₂SO₄,in water at 30 °C contains 78.0 g (NH₄)₂SO₄ per 100.0 g H₂O.What is the molality of this solution?

What is the expected freezing point of a 0.50 mol kg^-1 solution of Li₂SO₄ in water? K_f for water is 1.86 °C m^-1.

Henry's Law states that:

To make a 0.500 mol L^-1 solution,one could take 0.500 moles of solute and add:

Which of the following solutions will have the lowest freezing point?

A solution is prepared by adding 1.43 mol of KCl to 889 g of water.The concentration of KCl is ________ mol kg^-1.

Molality is independent of temperature,molarity is dependent on temperature.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Exam 14: Solutions and Their Physical Properties

How many grams of KBr are required to make 350.mL of a 0.115 mol L-1 KBr aqueous solution?

A solid solution of zinc in copper is an example of:

The vapor pressures of pure hexane and pure heptane at 25 °C are 151.4 mmHg and 45.62 mmHg respectively.A solution contains 0.800 mol fraction n-hexane and 0.200 mol fraction n-heptane.What is the composition of the vapor in equilibrium with this solution at 25 °C?

A crystal is placed into a solution and the solution seems to solidify while getting much warmer at the same time.The solution must have been:

The freezing point of a solution made by dissolving 8.9 g of MgCl2 in 98 g H2O is -4.3 °C.Kf for water is 1.86 °C m-1.The van't Hoff i factor for this solution is ________.

A saturated solution of ammonium sulfate, (NH4)2SO4,in water at 30 °C contains 78.0 g (NH4)2SO4 per 100.0 g H2O.What is the molality of this solution?

What is the expected freezing point of a 0.50 mol kg-1 solution of Li2SO4 in water? Kf for water is 1.86 °C m-1.

Henry's Law states that:

To make a 0.500 mol L-1 solution,one could take 0.500 moles of solute and add:

Which of the following solutions will have the lowest freezing point?

A solution is prepared by adding 1.43 mol of KCl to 889 g of water.The concentration of KCl is ________ mol kg-1.

Molality is independent of temperature,molarity is dependent on temperature.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

How many grams of KBr are required to make 350.mL of a 0.115 mol L^-1 KBr aqueous solution?

The freezing point of a solution made by dissolving 8.9 g of MgCl₂ in 98 g H₂O is -4.3 °C.K_f for water is 1.86 °C m^-1.The van't Hoff i factor for this solution is ________.

A saturated solution of ammonium sulfate, (NH₄)₂SO₄,in water at 30 °C contains 78.0 g (NH₄)₂SO₄ per 100.0 g H₂O.What is the molality of this solution?

What is the expected freezing point of a 0.50 mol kg^-1 solution of Li₂SO₄ in water? K_f for water is 1.86 °C m^-1.

To make a 0.500 mol L^-1 solution,one could take 0.500 moles of solute and add:

A solution is prepared by adding 1.43 mol of KCl to 889 g of water.The concentration of KCl is ________ mol kg^-1.