Question 1

A 0.100 m MgSO4 solution has a freezing point of -0.23°C.What is the van't Hoff factor for this solution? (Kf = 1.86°C/m)

Accepted Answer

A) 0.62 
B) 1.0 
C) 1.2 
D) 2.0 
E) 4.0 
A) 0.62 
B) 1.0 
C) 1.2 
D) 2.0 
E) 4.0

Question 2

Carbon tetrachloride,once widely used in fire extinguishers and as a dry cleaning fluid,has been found to cause liver damage to those exposed to its vapors over long periods of time.What is the boiling point of a solution prepared by dissolving 375 g of sulfur (S8,256.5 g/mol)in 1250 g of CCl4? (For CCl4,Kb = 5.05°C/m; boiling point of pure CCl4 = 76.7°C)

Accepted Answer

A) 70.8°C 
B) 75.2°C 
C) 78.2°C 
D) 82.6°C 
E) 85.7°C 
A) 70.8°C 
B) 75.2°C 
C) 78.2°C 
D) 82.6°C 
E) 85.7°C

Question 3

What is the name given to the process when solvent molecules surround the solute molecules?

Accepted Answer

A) Unsaturated 
B) Solution 
C) Oversaturated 
D) Saturated 
E) Solvation 
A) Unsaturated 
B) Solution 
C) Oversaturated 
D) Saturated 
E) Solvation

Question 4

Explain the following,on the basis of osmosis or osmotic pressure: In trees and plants,water is drawn from the soil up into the branches and leaves.

Accepted Answer

The water passes into the cell

Question 5

The solubility of gases in water always decreases with increasing temperature.

Accepted Answer

A) True 
 B)False

Question 6

Below is a representation of a sealed chamber containing pure liquid water in equilibrium with water vapor.The circles represent water vapor.   If a nonvolatile solute is added to the water,which best represents the new system at equilibrium?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water at 25ºC.At this temperature,the density of water is 0.997g/mL.

Accepted Answer

A) 1.51% 
B) 7.57% 
C) 13.3% 
D) 15.2% 
E) 86.7% 
A) 1.51% 
B) 7.57% 
C) 13.3% 
D) 15.2% 
E) 86.7%

Question 8

What volume of a 2.75 M solution of NaOH is required to make 500.0 mL of a 1.27 M solution of NaOH?

Accepted Answer

A) 231 mL 
B) 1.72 L 
C) 1.10 L 
D) 440 mL 
E) 909 mL 
A) 231 mL 
B) 1.72 L 
C) 1.10 L 
D) 440 mL 
E) 909 mL

Question 9

What mass of LiOH is required to prepare 0.250 L of a 3.55 M solution?

Accepted Answer

A) 0.0371 g 
B) 0.888 g 
C) 21.3 g 
D) 250.g 
E) 340.g 
A) 0.0371 g 
B) 0.888 g 
C) 21.3 g 
D) 250.g 
E) 340.g

Question 10

Colloidal particles may be solids,liquids,or gases.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following aqueous solutions should demonstrate the most nonideal behavior?

Accepted Answer

A) 0.1 M NaI 
B) 0.2 M CuSO4 
C) 0.5 M KBr 
D) 2.0 M CuCl2 
E) 2.5 M CsCl 
A) 0.1 M NaI 
B) 0.2 M CuSO4 
C) 0.5 M KBr 
D) 2.0 M CuCl2 
E) 2.5 M CsCl

Question 12

What is the quantitative relationship between gas solubility and pressure?

Accepted Answer

A) Entropy 
B) Henry's law 
C) Enthalpy 
D) Boyle's law 
E) Avogadro's law 
A) Entropy 
B) Henry's law 
C) Enthalpy 
D) Boyle's law 
E) Avogadro's law

Question 13

Which of the following is not soluble in water?

Accepted Answer

A) Vitamin C 
B) NaCl 
C) CH3CH2OH 
D) NH3 
E) Vitamin E 
A) Vitamin C 
B) NaCl 
C) CH3CH2OH 
D) NH3 
E) Vitamin E

Question 14

Which compound is the most soluble in water?

Accepted Answer

A) CH3CH2CH2CH2CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2OH 
E) All of these compounds are equally soluble in water. 
A) CH3CH2CH2CH2CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2OH 
E) All of these compounds are equally soluble in water.

Question 15

When two pure substances are mixed to form a solution

Accepted Answer

A) heat is released. 
B) heat is absorbed. 
C) there is an increase in entropy. 
D) there is a decrease in entropy. 
E) entropy is conserved. 
A) heat is released. 
B) heat is absorbed. 
C) there is an increase in entropy. 
D) there is a decrease in entropy. 
E) entropy is conserved.

Question 16

______________ ______________ is the percentage of dissolved molecules that separate into ions in solution.

Accepted Answer

Percent di

Question 17

___________ _________ are properties that depend on the number of particles dissolved.

Accepted Answer

Colligativ

Question 18

What is the name for a solute that does not exert a vapor pressure when it is dissolved in a liquid?

Accepted Answer

A) Colloid 
B) Amorphous solid 
C) Nonvolatile 
D) Crystalline solid 
E) Electrolyte 
A) Colloid 
B) Amorphous solid 
C) Nonvolatile 
D) Crystalline solid 
E) Electrolyte

Question 19

What states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the solution?

Accepted Answer

A) Entropy 
B) Henry's law 
C) Dissolution 
D) Vapor pressure 
E) Enthalpy of salvation 
A) Entropy 
B) Henry's law 
C) Dissolution 
D) Vapor pressure 
E) Enthalpy of salvation

Question 20

What volume of ethanol (density = 0.7893 g/cm3)should be added to 450.mL of water in order to have a solution that freezes at -15.0°C? Assume the density of water is 1.0g/mL.(For water,Kf = 1.86 °C/m.)

Accepted Answer

A) 371 mL 
B) 470 mL 
C) 212 mL 
D) 132 mL 
E) 167 mL 
A) 371 mL 
B) 470 mL 
C) 212 mL 
D) 132 mL 
E) 167 mL

Exam 13: Physical Properties of Solutions

A 0.100 m MgSO4 solution has a freezing point of -0.23°C.What is the van't Hoff factor for this solution? (Kf = 1.86°C/m)

What is the name given to the process when solvent molecules surround the solute molecules?

Explain the following,on the basis of osmosis or osmotic pressure: In trees and plants,water is drawn from the soil up into the branches and leaves.

The solubility of gases in water always decreases with increasing temperature.

Below is a representation of a sealed chamber containing pure liquid water in equilibrium with water vapor.The circles represent water vapor. If a nonvolatile solute is added to the water,which best represents the new system at equilibrium?

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water at 25ºC.At this temperature,the density of water is 0.997g/mL.

What volume of a 2.75 M solution of NaOH is required to make 500.0 mL of a 1.27 M solution of NaOH?

What mass of LiOH is required to prepare 0.250 L of a 3.55 M solution?

Colloidal particles may be solids,liquids,or gases.

Which of the following aqueous solutions should demonstrate the most nonideal behavior?

What is the quantitative relationship between gas solubility and pressure?

Which of the following is not soluble in water?

Which compound is the most soluble in water?

When two pure substances are mixed to form a solution

______________ ______________ is the percentage of dissolved molecules that separate into ions in solution.

___________ _________ are properties that depend on the number of particles dissolved.

What is the name for a solute that does not exert a vapor pressure when it is dissolved in a liquid?

What states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the solution?

What volume of ethanol (density = 0.7893 g/cm3)should be added to 450.mL of water in order to have a solution that freezes at -15.0°C? Assume the density of water is 1.0g/mL.(For water,Kf = 1.86 °C/m.)

Chemistry: the Central Science

Atoms Molecules and Ions

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

A 0.100 m MgSO₄ solution has a freezing point of -0.23°C.What is the van't Hoff factor for this solution? (K_f = 1.86°C/m)

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water at 25ºC.At this temperature,the density of water is 0.997g/mL.

is the percentage of dissolved molecules that separate into ions in solution.

___ _ are properties that depend on the number of particles dissolved.

What volume of ethanol (density = 0.7893 g/cm³)should be added to 450.mL of water in order to have a solution that freezes at -15.0°C? Assume the density of water is 1.0g/mL.(For water,K_f = 1.86 °C/m.)