Question 1

What volume of concentrated (14.7 M)phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

Accepted Answer

A) 0.20 L 
B) 0.57 L 
C) 1.8 L 
D) 3.6 L 
E) 5.1 L 
A) 0.20 L 
B) 0.57 L 
C) 1.8 L 
D) 3.6 L 
E) 5.1 L

Question 2

______ is the value for i,the van't Hoff factor,for all nonelectrolytes.

Accepted Answer

The answer of ______ is the value for i,the van't...

Question 3

Sodium hydroxide is a common ingredient in drain cleaners such as Drano.The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310.What is the molality of the solution?

Accepted Answer

A) 0.310 m 
B) 0.690 m 
C) 1.24 m 
D) 12.4 m 
E) 24.9 m 
A) 0.310 m 
B) 0.690 m 
C) 1.24 m 
D) 12.4 m 
E) 24.9 m

Question 4

What is defined as a solution that has a lower concentration of dissolved substances than plasma?

Accepted Answer

A) Hypotonic 
B) Hypertonic 
C) Aplasmic 
D) Plasmic 
E) Colloidal 
A) Hypotonic 
B) Hypertonic 
C) Aplasmic 
D) Plasmic 
E) Colloidal

Question 5

The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the aqueous solubility of atmospheric O2 is 2.67 × 10-4 M at sea level and 25°C,what is the solubility of O2 at an elevation of 12,000 ft where the total pressure is 0.657 atm? Assume the temperature is 25°C,and that the mole fraction of O2 in air is 0.209
At both 12,000 ft and at sea level.

Accepted Answer

A) 1.75 × 10-4 M 
B) 2.67 × 10-4 M 
C) 3.66 × 10-5 M 
D) 4.06 × 10-4 M 
E) 5.58 × 10-5 M 
A) 1.75 × 10-4 M 
B) 2.67 × 10-4 M 
C) 3.66 × 10-5 M 
D) 4.06 × 10-4 M 
E) 5.58 × 10-5 M

Question 6

Which accurately characterizes all nonelectrolyte solutions?

Accepted Answer

A) Nonelectrolyte solutions contain molecules. 
B) Nonelectrolyte solutions conduct electricity. 
C) Nonelectrolyte solutions react with other solutions. 
D) Nonelectrolyte solutions do not conduct electricity. 
E) Nonelectrolyte solutions conduct heat. 
A) Nonelectrolyte solutions contain molecules. 
B) Nonelectrolyte solutions conduct electricity. 
C) Nonelectrolyte solutions react with other solutions. 
D) Nonelectrolyte solutions do not conduct electricity. 
E) Nonelectrolyte solutions conduct heat.

Question 7

Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

Accepted Answer

A) electrolysis 
B) dissociation 
C) division 
D) ionization 
E) decomposition 
A) electrolysis 
B) dissociation 
C) division 
D) ionization 
E) decomposition

Question 8

Which combination of a 36.0% (w/w)stock solution of acetic acid (d = 1.045 g/mL)and water will result in 1.00 kg of a 15.0% (w/w)acetic acid solution?

Accepted Answer

A) 417 mL of 36% acetic acid in 583 mL of distilled water 
B) 417 g of 36% acetic acid in 583 g of distilled water 
C) 360 mL of 36% acetic acid in 640 mL of distilled water 
D) 360 g of 36% acetic acid in 640 g of distilled water 
E) 150 g of 36% acetic acid in 850 g of distilled water 
A) 417 mL of 36% acetic acid in 583 mL of distilled water 
B) 417 g of 36% acetic acid in 583 g of distilled water 
C) 360 mL of 36% acetic acid in 640 mL of distilled water 
D) 360 g of 36% acetic acid in 640 g of distilled water 
E) 150 g of 36% acetic acid in 850 g of distilled water

Question 9

The solubility of gases in water ___________ (increases or decreases)as the temperature increases.

Accepted Answer

The answer of The solubility of gases in water ___________...

Question 10

Which of these compounds is a nonelectrolyte?

Accepted Answer

A) NaOH 
B) HNO3 
C) C2H6O (ethanol) 
D) KF 
E) CH3COOH (acetic acid) 
A) NaOH 
B) HNO3 
C) C2H6O (ethanol) 
D) KF 
E) CH3COOH (acetic acid)

Question 11

What is the name of a solution that obeys Raoult's law?

Accepted Answer

A) Ideal solution 
B) Nonideal solution 
C) Suspension 
D) Solute 
E) Solvent 
A) Ideal solution 
B) Nonideal solution 
C) Suspension 
D) Solute 
E) Solvent

Question 12

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) 0.045 
A) 0.0169 
B) 0.0197 
C) 0.145 
D) 0.855 
E) 0.045

Question 13

Aqueous ammonia is commercially available in a solution that is 28% (w/w)ammonia. What is the mole fraction of ammonia in such a solution?

Accepted Answer

A) 0.017 
B) 0.023 
C) 0.012 
D) 0.24 
E) 0.29 
A) 0.017 
B) 0.023 
C) 0.012 
D) 0.24 
E) 0.29

Question 14

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol)must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Accepted Answer

A) 19.6 g 
B) 17.2 g 
C) 40.7 g 
D) 50.9 g 
E) 157 g 
A) 19.6 g 
B) 17.2 g 
C) 40.7 g 
D) 50.9 g 
E) 157 g

Question 15

Which is the correct description of a solution?

Accepted Answer

A) A solution is a heterogeneous mixture of two or more substances. 
B) A solution is a homogeneous mixture of two or more substances. 
C) A solution may be a gas,solid,or liquid. 
D) A solution is any mixture of two or more substances. 
E) Both the choices are correct 
A) A solution is a heterogeneous mixture of two or more substances. 
B) A solution is a homogeneous mixture of two or more substances. 
C) A solution may be a gas,solid,or liquid. 
D) A solution is any mixture of two or more substances. 
E) Both the choices are correct

Question 16

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO4)in this solution?

Accepted Answer

A) 0.0080 
B) 0.0086 
C) 0.066 
D) 0.071 
E) 0.48 
A) 0.0080 
B) 0.0086 
C) 0.066 
D) 0.071 
E) 0.48

Question 17

What term describes the process when two liquids are completely soluble in each other in all proportions?

Accepted Answer

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

Question 18

From the following list of aqueous solutions and water,select the one with the highest freezing point.

Accepted Answer

A) 1.0 M KNO3 
B) 0.75 M NaCl 
C) 0.75 M CuCl2 
D) 2.0 M C12H22O11 (sucrose) 
E) 2.0 M KNO3 
A) 1.0 M KNO3 
B) 0.75 M NaCl 
C) 0.75 M CuCl2 
D) 2.0 M C12H22O11 (sucrose) 
E) 2.0 M KNO3

Question 19

When a nonvolatile solute is dissolved in a liquid,the vapor pressure exerted by the liquid decreases.

Accepted Answer

A) True 
 B)False

Question 20

If a solute dissolves in an endothermic process

Accepted Answer

A) hydrogen bonds must exist between solvent and solute. 
B) strong ion-dipole forces must exist in the solution. 
C) the solute must be a gas. 
D) the entropy of the solution is immaterial. 
E) the entropy of the solution must be greater than that of its pure components. 
A) hydrogen bonds must exist between solvent and solute. 
B) strong ion-dipole forces must exist in the solution. 
C) the solute must be a gas. 
D) the entropy of the solution is immaterial. 
E) the entropy of the solution must be greater than that of its pure components.

Exam 13: Physical Properties of Solutions

What volume of concentrated (14.7 M)phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

______ is the value for i,the van't Hoff factor,for all nonelectrolytes.

Sodium hydroxide is a common ingredient in drain cleaners such as Drano.The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310.What is the molality of the solution?

What is defined as a solution that has a lower concentration of dissolved substances than plasma?

Which accurately characterizes all nonelectrolyte solutions?

Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

Which combination of a 36.0% (w/w)stock solution of acetic acid (d = 1.045 g/mL)and water will result in 1.00 kg of a 15.0% (w/w)acetic acid solution?

The solubility of gases in water ___________ (increases or decreases)as the temperature increases.

Which of these compounds is a nonelectrolyte?

What is the name of a solution that obeys Raoult's law?

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?

Aqueous ammonia is commercially available in a solution that is 28% (w/w)ammonia. What is the mole fraction of ammonia in such a solution?

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol)must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Which is the correct description of a solution?

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO4)in this solution?

What term describes the process when two liquids are completely soluble in each other in all proportions?

From the following list of aqueous solutions and water,select the one with the highest freezing point.

When a nonvolatile solute is dissolved in a liquid,the vapor pressure exerted by the liquid decreases.

If a solute dissolves in an endothermic process

Chemistry: the Central Science

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Quantum Theory and the Electronic Structure of Atoms

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What volume of concentrated (14.7 M)phosphoric acid is needed to prepare 25.0 L of 3.0 M H₃PO₄?

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol)must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,K_b = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO₄)in this solution?