Question 1

Calculate the molality of a 20.0% by mass ammonium sulfate (NH4)2SO4 solution.The density of the solution is 1.117 g/mL.

Accepted Answer

A) 0.151 m 
B) 0.200 m 
C) 0.223 m 
D) 1.51 m 
E) 1.89 m 
A) 0.151 m 
B) 0.200 m 
C) 0.223 m 
D) 1.51 m 
E) 1.89 m

Question 2

What name is given to a minor component in a solution?

Accepted Answer

A) Solvent 
B) Unsaturated 
C) Saturated 
D) Solute 
E) Supersaturated 
A) Solvent 
B) Unsaturated 
C) Saturated 
D) Solute 
E) Supersaturated

Question 3

Barbiturates are synthetic drugs used as sedatives and hypnotics.Barbital (184.2g/mol)is one of the simplest of these drugs.What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? (For pure acetic acid,Kb = 3.07°C/m; boiling point of pure acetic acid = 117.9°C)

Accepted Answer

A) 117.0°C 
B) 117.7°C 
C) 118.1°C 
D) 118.8°C 
E) 120.4°C 
A) 117.0°C 
B) 117.7°C 
C) 118.1°C 
D) 118.8°C 
E) 120.4°C

Question 4

Gases with high boiling points tend to be more soluble in water than ones with low boiling points.

Accepted Answer

A) True 
 B)False

Question 5

What is the value for the van't Hoff factor for all nonelectrolytes?

Accepted Answer

A) -1 
B) 0 
C) 1 
D) ½ 
E) -½ 
A) -1 
B) 0 
C) 1 
D) ½ 
E) -½

Question 6

What name is given to the major component in a solution?

Accepted Answer

A) Supersaturated 
B) Solute 
C) Saturated 
D) Unsaturated 
E) Solvent 
A) Supersaturated 
B) Solute 
C) Saturated 
D) Unsaturated 
E) Solvent

Question 7

What is the name given to a solution that contains less solute than it has the capacity to dissolve?

Accepted Answer

A) Unsaturated 
B) Saturated 
C) Solvented 
D) Oversaturated 
E) Supersaturated 
A) Unsaturated 
B) Saturated 
C) Solvented 
D) Oversaturated 
E) Supersaturated

Question 8

Which one of the following substances is the strongest electrolyte?

Accepted Answer

A) CO 
B) CH3Cl 
C) CH4 
D) C2H5OH 
E) HCl 
A) CO 
B) CH3Cl 
C) CH4 
D) C2H5OH 
E) HCl

Question 9

Which is most soluble in CCl4?

Accepted Answer

A) NaCl 
B) H2O 
C) NaOH 
D) C8H18 
E) CH3OH 
A) NaCl 
B) H2O 
C) NaOH 
D) C8H18 
E) CH3OH

Question 10

What is the freezing point of a solution made from 22.0 g of octane (C8H18)dissolved in 148.0 g of benzene? (For benzene,freezing point = 5.50°C; Kf = 5.12°C/m)

Accepted Answer

A) -1.16°C 
B) 0.98°C 
C) 6.66°C 
D) 12.2°C 
E) 5.49°C 
A) -1.16°C 
B) 0.98°C 
C) 6.66°C 
D) 12.2°C 
E) 5.49°C

Question 11

What is the molarity of a solution prepared by diluting 1.85 L of 6.5 M KOH to 11.0 L?

Accepted Answer

A) 0.28 M 
B) 0.91 M 
C) 1.1 M 
D) 3.1 M 
E) 3.9 M 
A) 0.28 M 
B) 0.91 M 
C) 1.1 M 
D) 3.1 M 
E) 3.9 M

Question 12

Calcium nitrite is used as a corrosion inhibitor in lubricants.What is the molality of a solution prepared by dissolving 18.5 g of calcium nitrite in 83.5 g of distilled water?

Accepted Answer

A) 0.181 m 
B) 0.222 m 
C) 0.596 m 
D) 1.35 m 
E) 1.68 m 
A) 0.181 m 
B) 0.222 m 
C) 0.596 m 
D) 1.35 m 
E) 1.68 m

Question 13

Which of these compounds is a strong electrolyte?

Accepted Answer

A) H2O 
B) O2 
C) H2SO4 
D) C6H12O6 (glucose) 
E) CH3COOH (acetic acid) 
A) H2O 
B) O2 
C) H2SO4 
D) C6H12O6 (glucose) 
E) CH3COOH (acetic acid)

Question 14

What is the percent CsCl by mass in a 0.711 M aqueous CsCl solution that has a density of 1.091g/mL?

Accepted Answer

A) 1.53% 
B) 3.87 × 10-1% 
C) 11.0% 
D) 12.0% 
E) 65.2% 
A) 1.53% 
B) 3.87 × 10-1% 
C) 11.0% 
D) 12.0% 
E) 65.2%

Question 15

The distinguishing characteristic of all nonelectrolyte solutions is that they

Accepted Answer

A) contain ions. 
B) do not conduct electricity. 
C) react with other solutions. 
D) always contain acids. 
E) conducts heat. 
A) contain ions. 
B) do not conduct electricity. 
C) react with other solutions. 
D) always contain acids. 
E) conducts heat.

Question 16

The osmotic pressure of a 0.010 M MgSO4 solution at 25°C is 0.318 atm.Calculate i,the van't Hoff factor,for this MgSO4 solution. (R = 0.08206 L • atm/K • mol)

Accepted Answer

A) 0.013 
B) 1.3 
C) 1.5 
D) 2.0 
E) 76.8 
A) 0.013 
B) 1.3 
C) 1.5 
D) 2.0 
E) 76.8

Question 17

Which substance is present in the largest proportion in a solution?

Accepted Answer

A) salute 
B) gas 
C) solvent 
D) solid 
E) solute 
A) salute 
B) gas 
C) solvent 
D) solid 
E) solute

Question 18

Below is a diagram representing a solvent A(l)in a 1-L beaker,and a solute X dissolved in the solvent.Solvent A has a density of 0.8 g/mL,and a molar mass of 40 g/mol. Solute X has a molar mass of 30 g/mol.Each circle of X represents 1 mol of X.Assume that the solute addition does not significantly change the volume of liquid in the beaker.   What is the mole fraction of the solute X in this solution?

Accepted Answer

A) 0.67 
B) 0.53 
C) 0.27 
D) 0.21 
E) 0.04 
A) 0.67 
B) 0.53 
C) 0.27 
D) 0.21 
E) 0.04

Question 19

The mixing of solvent molecules and solute molecules is usually described as

Accepted Answer

A) the separation energy. 
B) the heat of solvation. 
C) an endothermic process. 
D) an exothermic process. 
E) the heat of solution. 
A) the separation energy. 
B) the heat of solvation. 
C) an endothermic process. 
D) an exothermic process. 
E) the heat of solution.

Question 20

What is defined as a solution that has a higher 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

Exam 13: Physical Properties of Solutions

Calculate the molality of a 20.0% by mass ammonium sulfate (NH4)2SO4 solution.The density of the solution is 1.117 g/mL.

What name is given to a minor component in a solution?

Gases with high boiling points tend to be more soluble in water than ones with low boiling points.

What is the value for the van't Hoff factor for all nonelectrolytes?

What name is given to the major component in a solution?

What is the name given to a solution that contains less solute than it has the capacity to dissolve?

Which one of the following substances is the strongest electrolyte?

Which is most soluble in CCl4?

What is the freezing point of a solution made from 22.0 g of octane (C8H18)dissolved in 148.0 g of benzene? (For benzene,freezing point = 5.50°C; Kf = 5.12°C/m)

What is the molarity of a solution prepared by diluting 1.85 L of 6.5 M KOH to 11.0 L?

Calcium nitrite is used as a corrosion inhibitor in lubricants.What is the molality of a solution prepared by dissolving 18.5 g of calcium nitrite in 83.5 g of distilled water?

Which of these compounds is a strong electrolyte?

What is the percent CsCl by mass in a 0.711 M aqueous CsCl solution that has a density of 1.091g/mL?

The distinguishing characteristic of all nonelectrolyte solutions is that they

The osmotic pressure of a 0.010 M MgSO4 solution at 25°C is 0.318 atm.Calculate i,the van't Hoff factor,for this MgSO4 solution. (R = 0.08206 L • atm/K • mol)

Which substance is present in the largest proportion in a solution?

The mixing of solvent molecules and solute molecules is usually described as

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

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

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Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

Calculate the molality of a 20.0% by mass ammonium sulfate (NH₄)₂SO₄ solution.The density of the solution is 1.117 g/mL.

Which is most soluble in CCl₄?

What is the freezing point of a solution made from 22.0 g of octane (C₈H₁₈)dissolved in 148.0 g of benzene? (For benzene,freezing point = 5.50°C; K_f = 5.12°C/m)

The osmotic pressure of a 0.010 M MgSO₄ solution at 25°C is 0.318 atm.Calculate i,the van't Hoff factor,for this MgSO₄ solution. (R = 0.08206 L • atm/K • mol)