Question 1

For a given solution, which of the following concentration values will change as temperature changes?

Accepted Answer

A)  mass percent 
B)  molality 
C)  mole fraction 
D)  molarity 
E)  none of the above 
A)  mass percent 
B)  molality 
C)  mole fraction 
D)  molarity 
E)  none of the above

Question 2

Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?

Accepted Answer

A)  0.0169 
B)  0.0197 
C)  0.145 
D)  0.855 
E)  none of the above 
A)  0.0169 
B)  0.0197 
C)  0.145 
D)  0.855 
E)  none of the above

Question 3

Which of the following aqueous solutions will have the lowest osmotic pressure?

Accepted Answer

A)  0.10 m KOH 
B)  0.10 m RbCl 
C)  0.05 m CaSO4 
D)  0.05 m BaCl2 
E)  0.10 m K2SO4 
A)  0.10 m KOH 
B)  0.10 m RbCl 
C)  0.05 m CaSO4 
D)  0.05 m BaCl2 
E)  0.10 m K2SO4

Question 4

What is the molality of a solution prepared by dissolving 86.9 g of diethyl ether, C4H10O, in 425 g of benzene, C6H6?

Accepted Answer

A)  0.362 m 
B)  0.498 m 
C)  2.01 m 
D)  2.76 m 
E)  none of the above 
A)  0.362 m 
B)  0.498 m 
C)  2.01 m 
D)  2.76 m 
E)  none of the above

Question 5

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?

Accepted Answer

A)  0.87 
B)  0.69 
C)  0.32 
D)  0.13 
E)  0.045 
A)  0.87 
B)  0.69 
C)  0.32 
D)  0.13 
E)  0.045

For a given solution, which of the following concentration values will change as temperature changes?

Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?

Which of the following aqueous solutions will have the lowest osmotic pressure?

What is the molality of a solution prepared by dissolving 86.9 g of diethyl ether, C₄H₁₀O, in 425 g of benzene, C₆H₆?

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 13: The Properties of Mixtures: Solutions and Colloids

For a given solution, which of the following concentration values will change as temperature changes?

Diethyl ether has a vapor pressure of 400.0 torr at 18°C. When a sample of benzoic acid is dissolved in ether, the vapor pressure of the solution is 342 torr. What is the mole fraction of benzoic acid in the solution?

Which of the following aqueous solutions will have the lowest osmotic pressure?

What is the molality of a solution prepared by dissolving 86.9 g of diethyl ether, C4H10O, in 425 g of benzene, C6H6?

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

What is the molality of a solution prepared by dissolving 86.9 g of diethyl ether, C₄H₁₀O, in 425 g of benzene, C₆H₆?