Question 1

The concentration (M)of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6O is ________ M.The density of the solution is 0.79 g/mL.

Accepted Answer

A) 21 
B) 0.93 
C) 0.58 
D) 6.0 × 10-4 
E) 1.72 
A) 21 
B) 0.93 
C) 0.58 
D) 6.0 × 10-4 
E) 1.72 C

Question 2

A solution is prepared by dissolving 15.8 g of MgCl2 in 255 g of water.What is the mole fraction of Cl- in this solution?

Accepted Answer

A) 0.977 
B) 0.0116 
C) 0.0232 
D) 0.988 
E) 0.00583 
A) 0.977 
B) 0.0116 
C) 0.0232 
D) 0.988 
E) 0.00583 C

Question 3

The vapor pressure of pure water at 25 °C is 23.8 torr.What is the vapor pressure (torr)of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte,MW = 180.0 g/mol)in 95.0 g of water?

Accepted Answer

A) 24.3 
B) 23.4 
C) 0.451 
D) 0.443 
E) 23.8 
A) 24.3 
B) 23.4 
C) 0.451 
D) 0.443 
E) 23.8 B

Question 4

Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose (molar mass = 180.2 g/mol)in 920.0 ml of water at 25 °C.The vapor pressure of pure water at   is   .Assume the density of the solution is 1.00 g/ml.

Accepted Answer

A) 0.278 mm Hg 
B) 0.605 mm Hg 
C) 22.98 mm Hg 
D) 23.48 mm Hg 
E) 23.76 mm Hg 
A) 0.278 mm Hg 
B) 0.605 mm Hg 
C) 22.98 mm Hg 
D) 23.48 mm Hg 
E) 23.76 mm Hg

Question 5

A solution is prepared by dissolving 25.0 g of NaCl in 500.0 g of water.What is the molality (m)of NaCl in the solution? The density of the solution is 1.0 g/mL.

Accepted Answer

A) 0.000856 
B) 0.0500 
C) 50.0 
D) 8.56 
E) 0.856 
A) 0.000856 
B) 0.0500 
C) 50.0 
D) 8.56 
E) 0.856

Question 6

Which component of air is the primary problem in a condition known as "the bends"?

Accepted Answer

A) O2 
B) CO2 
C) He 
D) N2 
E) CO 
A) O2 
B) CO2 
C) He 
D) N2 
E) CO

Question 7

What is the mole fraction of HCl in a solution that is prepared by dissolving 25.5 g of HCl in   of water? The density of the solution is 1.0 g/mL.

Accepted Answer

A) 0.0155 
B) 0.0319 
C) 0.984 
D) 0.874 
E) 32.0 
A) 0.0155 
B) 0.0319 
C) 0.984 
D) 0.874 
E) 32.0

Question 8

How many grams of solution are present if a solute is dissolved in   of water and the concentration is 12.7% by mass?

Accepted Answer

A) 55.0 
B) 0.00722 
C) 72.2 
D) 20.2 
E) 1.39 
A) 55.0 
B) 0.00722 
C) 72.2 
D) 20.2 
E) 1.39

Question 9

The process of solute particles being surrounded by solvent particles is known as ________.

Accepted Answer

A) salutation 
B) agglomeration 
C) solvation 
D) agglutination 
E) dehydration 
A) salutation 
B) agglomeration 
C) solvation 
D) agglutination 
E) dehydration

Question 10

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

Question 11

Calculate the freezing point of a 0.09500 m aqueous solution of glucose.The molal freezing-point-depression constant of water is

Accepted Answer

A) 0.0475 
B) 0.106 
C) -0.0562 
D) -0.177 
E) -0.354 
A) 0.0475 
B) 0.106 
C) -0.0562 
D) -0.177 
E) -0.354

Question 12

Which of the following statements is false?

Accepted Answer

A) Nonpolar liquids tend to be insoluble in polar liquids. 
B) The weaker the attraction between the solute and solvent molecules, the greater the solubility. 
C) Substances with similar intermolecular attractive forces tend to be soluble in one another. 
D) The solubility of a gas increases in direct proportion to its partial pressure above the solution. 
E) The solubility of gases in water decreases with increasing temperature. 
A) Nonpolar liquids tend to be insoluble in polar liquids. 
B) The weaker the attraction between the solute and solvent molecules, the greater the solubility. 
C) Substances with similar intermolecular attractive forces tend to be soluble in one another. 
D) The solubility of a gas increases in direct proportion to its partial pressure above the solution. 
E) The solubility of gases in water decreases with increasing temperature.

Question 13

All of the following are considered to be colloids except ________.

Accepted Answer

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

Question 14

What is the mole fraction of nitric acid of a 16.2% (by mass)aqueous solution of nitric acid?

Accepted Answer

A) 0.0374 
B) 0.0721 
C) 0.0180 
D) 0.0523 
E) The density of the solution is needed to solve the problem. 
A) 0.0374 
B) 0.0721 
C) 0.0180 
D) 0.0523 
E) The density of the solution is needed to solve the problem.

Question 15

Calculate the mole fraction of phosphoric acid (H3PO4)in a 38.5% (by mass)aqueous solution.

Accepted Answer

A) 0.103 
B) 0.115 
C) 0.206 
D) 0.0516 
E) The density of the solution is needed to solve the problem. 
A) 0.103 
B) 0.115 
C) 0.206 
D) 0.0516 
E) The density of the solution is needed to solve the problem.

Question 16

A supersaturated solution ________.

Accepted Answer

A) is one with more than one solute 
B) is one that has been heated 
C) is one with a higher concentration than the solubility limit 
D) must be in contact with undissolved solid 
E) exists only in theory and cannot actually be prepared 
A) is one with more than one solute 
B) is one that has been heated 
C) is one with a higher concentration than the solubility limit 
D) must be in contact with undissolved solid 
E) exists only in theory and cannot actually be prepared

Question 17

A saturated solution ________.

Accepted Answer

A) contains dissolved solute in equilibrium with undissolved solute 
B) has the capacity to dissolve more solute 
C) contains no double bonds 
D) will rapidly precipitate if a seed crystal is added 
E) cannot be attained 
A) contains dissolved solute in equilibrium with undissolved solute 
B) has the capacity to dissolve more solute 
C) contains no double bonds 
D) will rapidly precipitate if a seed crystal is added 
E) cannot be attained

Question 18

Calculate the freezing point of a 0.05500 m aqueous solution of NaN   .The molal freezing-point-depression constant of water is   (Assume 100% ionization of NaNO3.)

Accepted Answer

A) 0.0286 
B) -0.106 
C) 0.106 
D) -0.0562 
E) -0.205 
A) 0.0286 
B) -0.106 
C) 0.106 
D) -0.0562 
E) -0.205

Question 19

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

Accepted Answer

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

Question 20

The mole fraction of NaCl in water is 0.0195.Calculate the vapor pressure lowering (in mm Hg)of the solution at 25.0 °C.(Note: The vapor pressure of pure water at 25.0 °C is 23.76 mm Hg.)

Accepted Answer

The answer of The mole fraction of NaCl in water...

Exam 13: Properties of Solutions

The concentration (M)of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6O is ________ M.The density of the solution is 0.79 g/mL.

A solution is prepared by dissolving 15.8 g of MgCl2 in 255 g of water.What is the mole fraction of Cl- in this solution?

The vapor pressure of pure water at 25 °C is 23.8 torr.What is the vapor pressure (torr)of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte,MW = 180.0 g/mol)in 95.0 g of water?

Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose (molar mass = 180.2 g/mol)in 920.0 ml of water at 25 °C.The vapor pressure of pure water at is .Assume the density of the solution is 1.00 g/ml.

A solution is prepared by dissolving 25.0 g of NaCl in 500.0 g of water.What is the molality (m)of NaCl in the solution? The density of the solution is 1.0 g/mL.

Which component of air is the primary problem in a condition known as "the bends"?

What is the mole fraction of HCl in a solution that is prepared by dissolving 25.5 g of HCl in of water? The density of the solution is 1.0 g/mL.

How many grams of solution are present if a solute is dissolved in of water and the concentration is 12.7% by mass?

The process of solute particles being surrounded by solvent particles is known as ________.

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.

Calculate the freezing point of a 0.09500 m aqueous solution of glucose.The molal freezing-point-depression constant of water is

Which of the following statements is false?

All of the following are considered to be colloids except ________.

What is the mole fraction of nitric acid of a 16.2% (by mass)aqueous solution of nitric acid?

Calculate the mole fraction of phosphoric acid (H3PO4)in a 38.5% (by mass)aqueous solution.

A supersaturated solution ________.

A saturated solution ________.

Calculate the freezing point of a 0.05500 m aqueous solution of NaN .The molal freezing-point-depression constant of water is (Assume 100% ionization of NaNO3.)

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

The mole fraction of NaCl in water is 0.0195.Calculate the vapor pressure lowering (in mm Hg)of the solution at 25.0 °C.(Note: The vapor pressure of pure water at 25.0 °C is 23.76 mm Hg.)

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

Filters

The concentration (M)of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C₂H₆O is ________ M.The density of the solution is 0.79 g/mL.

A solution is prepared by dissolving 15.8 g of MgCl₂ in 255 g of water.What is the mole fraction of Cl^- in this solution?

What is the mole fraction of HCl in a solution that is prepared by dissolving 25.5 g of HCl in $What is the mole fraction of HCl in a solution that is prepared by dissolving 25.5 g of HCl in of water? The density of the solution is 1.0 g/mL.$ of water? The density of the solution is 1.0 g/mL.

Calculate the mole fraction of phosphoric acid (H₃PO₄)in a 38.5% (by mass)aqueous solution.

Calculate the freezing point of a 0.05500 m aqueous solution of NaN .The molal freezing-point-depression constant of water is (Assume 100% ionization of NaNO₃.)