Question 1

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed?

Accepted Answer

A) ΔHsoln > 0,entropy of system decreases 
B) ΔHsoln ≈ 0,entropy of system decreases 
C) ΔHsoln ≈ 0,entropy change of system ≈ 0 
D) ΔHsoln ≈ 0,entropy of system increases 
E) None of these choices is correct. 
A) ΔHsoln > 0,entropy of system decreases 
B) ΔHsoln ≈ 0,entropy of system decreases 
C) ΔHsoln ≈ 0,entropy change of system ≈ 0 
D) ΔHsoln ≈ 0,entropy of system increases 
E) None of these choices is correct. D

Question 2

Which of these compounds is a weak electrolyte?

Accepted Answer

A) HCl 
B) CH3COOH (acetic acid) 
C) C6H12O6 (glucose) 
D) O2 
E) NaCl 
A) HCl 
B) CH3COOH (acetic acid) 
C) C6H12O6 (glucose) 
D) O2 
E) NaCl B

Question 3

When sodium chloride dissolves in water,what stabilizes the ions in solution?

Accepted Answer

The ion-dipole interactions of hydration

Question 4

What volume of water (d = 1.00 g/mL)should be added to 600.mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol,Kb = 1.22 °C/m; density = 0.789 g/cm3; boiling point = 78.4°C)

Accepted Answer

A) 186 mL 
B) 245 mL 
C) 518 mL 
D) 116 mL 
E) 322 mL 
A) 186 mL 
B) 245 mL 
C) 518 mL 
D) 116 mL 
E) 322 mL

Question 5

The structure of Vitamin B1,thiamine,is shown here.Vitamin B1 is most soluble in _________.

Accepted Answer

A) fats 
B) water 
C) air 
D) carbon tetrachloride 
E) octane 
A) fats 
B) water 
C) air 
D) carbon tetrachloride 
E) octane

Question 6

What is the molality of a solution prepared by dissolving 84.7 g of KMnO4 in 165 g of water?

Accepted Answer

A) 0.339 m 
B) 0.513 m 
C) 0.536 m 
D) 3.25 m 
E) 81.1 m 
A) 0.339 m 
B) 0.513 m 
C) 0.536 m 
D) 3.25 m 
E) 81.1 m

Question 7

What relationship states that the partial pressure of a solvent over a solution is given by the vapor pressure of the pure solvent times the mole fraction of the solvent in the solution?

Accepted Answer

A) Henry's law 
B) Law of partial pressures 
C) Curie's law 
D) Raoult's law 
E) Vapor pressure 
A) Henry's law 
B) Law of partial pressures 
C) Curie's law 
D) Raoult's law 
E) Vapor pressure

Question 8

The distinguishing characteristic of all electrolyte solutions is that they

Accepted Answer

A) contain molecules. 
B) conduct electricity. 
C) react with other solutions. 
D) always contain acids. 
E) conduct heat. 
A) contain molecules. 
B) conduct electricity. 
C) react with other solutions. 
D) always contain acids. 
E) conduct heat.

Question 9

What is the molarity of a solution of 10.0% by mass cadmium sulfate,CdSO4 (208.47g/mol)? The density of the solution is 1.10 g/mL.

Accepted Answer

A) 0.528 M 
B) 0.436 M 
C) 0.479 M 
D) 0.100 M 
E) 1.89 M 
A) 0.528 M 
B) 0.436 M 
C) 0.479 M 
D) 0.100 M 
E) 1.89 M

Question 10

__________ colloids are solutions containing extremely large molecules such as proteins.These colloids are also termed "water loving".

Accepted Answer

A) Hydrophobic 
B) Aerosol 
C) Hydrophilic 
D) Emulsion 
E) Solid sol 
A) Hydrophobic 
B) Aerosol 
C) Hydrophilic 
D) Emulsion 
E) Solid sol

Question 11

Cinnamaldehyde (132.16 g/mol)is used as a flavoring agent.What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol,Kb = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

Accepted Answer

A) 62.4 g 
B) 67.8 g 
C) 76.2 g 
D) 78.5 g 
E) 79.6 g 
A) 62.4 g 
B) 67.8 g 
C) 76.2 g 
D) 78.5 g 
E) 79.6 g

Question 12

g of benzene by 0.47°C? (Kf of benzene is 5.12°C/m.)

Accepted Answer

A) 93 g/mol 
B) 78 g/mol 
C) 10.7 g/mol 
D) 82 g/mol 
E) 927 g/mol 
A) 93 g/mol 
B) 78 g/mol 
C) 10.7 g/mol 
D) 82 g/mol 
E) 927 g/mol

Question 13

Explain the following,on the basis of osmosis or osmotic pressure: Drinking salt water actually dehydrates our tissues.

Accepted Answer

The water passes fro

Question 14

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation,winter or summer.Why should you not use ordinary water during the summer?

Accepted Answer

The antifreeze will lower the vapor pres

Question 15

Below is a diagram representing a gas G in equilibrium,above a sample of water and dissolved in the water.   If the pressure of the gas G is doubled,which diagram below best represents how the system will respond?

Accepted Answer

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

Question 16

Which of these compounds is a weak electrolyte?

Accepted Answer

A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl 
A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl

Question 17

A(n)_______________ ___________ is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

Accepted Answer

semipermea

Question 18

If the shell of a raw egg is carefully dissolved away,and the egg in its flexible membrane is then placed in distilled water,the egg's volume will expand.Explain.

Accepted Answer

The osmotic pressure of the solution ins

Question 19

Which response lists all the following pairs that are miscible liquids? I.octane (C8H18)and water
II)acetic acid (CH3COOH)and water
III)octane (C8H18)and carbon tetrachloride (CCl4)

Accepted Answer

A) I and III 
B) I and II 
C) III only 
D) II only 
E) II and III 
A) I and III 
B) I and II 
C) III only 
D) II only 
E) II and III

Question 20

An emulsion is a dispersion consisting of a

Accepted Answer

A) solid in a liquid. 
B) liquid in a liquid. 
C) gas in a liquid. 
D) liquid in a solid. 
E) gas in a solid. 
A) solid in a liquid. 
B) liquid in a liquid. 
C) gas in a liquid. 
D) liquid in a solid. 
E) gas in a solid.

Exam 13: Physical Properties of Solutions

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed?

Which of these compounds is a weak electrolyte?

When sodium chloride dissolves in water,what stabilizes the ions in solution?

What volume of water (d = 1.00 g/mL)should be added to 600.mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol,Kb = 1.22 °C/m; density = 0.789 g/cm3; boiling point = 78.4°C)

The structure of Vitamin B1,thiamine,is shown here.Vitamin B1 is most soluble in _________.

What is the molality of a solution prepared by dissolving 84.7 g of KMnO4 in 165 g of water?

What relationship states that the partial pressure of a solvent over a solution is given by the vapor pressure of the pure solvent times the mole fraction of the solvent in the solution?

The distinguishing characteristic of all electrolyte solutions is that they

What is the molarity of a solution of 10.0% by mass cadmium sulfate,CdSO4 (208.47g/mol)? The density of the solution is 1.10 g/mL.

__________ colloids are solutions containing extremely large molecules such as proteins.These colloids are also termed "water loving".

Cinnamaldehyde (132.16 g/mol)is used as a flavoring agent.What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol,Kb = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

g of benzene by 0.47°C? (Kf of benzene is 5.12°C/m.)

Explain the following,on the basis of osmosis or osmotic pressure: Drinking salt water actually dehydrates our tissues.

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation,winter or summer.Why should you not use ordinary water during the summer?

Below is a diagram representing a gas G in equilibrium,above a sample of water and dissolved in the water. If the pressure of the gas G is doubled,which diagram below best represents how the system will respond?

Which of these compounds is a weak electrolyte?

A(n)_______________ ___________ is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

If the shell of a raw egg is carefully dissolved away,and the egg in its flexible membrane is then placed in distilled water,the egg's volume will expand.Explain.

Which response lists all the following pairs that are miscible liquids? I.octane (C8H18)and water II)acetic acid (CH3COOH)and water III)octane (C8H18)and carbon tetrachloride (CCl4)

An emulsion is a dispersion consisting of a

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What volume of water (d = 1.00 g/mL)should be added to 600.mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol,K_b = 1.22 °C/m; density = 0.789 g/cm³; boiling point = 78.4°C)

What is the molality of a solution prepared by dissolving 84.7 g of KMnO₄ in 165 g of water?

What is the molarity of a solution of 10.0% by mass cadmium sulfate,CdSO₄ (208.47g/mol)? The density of the solution is 1.10 g/mL.

Cinnamaldehyde (132.16 g/mol)is used as a flavoring agent.What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol,K_b = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

g of benzene by 0.47°C? (K_f of benzene is 5.12°C/m.)

A(n)_____ _ is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

Which response lists all the following pairs that are miscible liquids? I.octane (C₈H₁₈)and water II)acetic acid (CH₃COOH)and water III)octane (C₈H₁₈)and carbon tetrachloride (CCl₄)