Question 1

Which of the following pairs can produce a homogeneous mixture?

Accepted Answer

A) water and sand 
B) oil and vinegar 
C) vinegar and glucose 
D) calcium carbonate and water 
A) water and sand 
B) oil and vinegar 
C) vinegar and glucose 
D) calcium carbonate and water

Question 2

The primary intermolecular attractions between CH3-OH and H2O are

Accepted Answer

A) hydrogen bonds. 
B) dispersion forces. 
C) covalent bonds. 
D) dipolar forces. 
A) hydrogen bonds. 
B) dispersion forces. 
C) covalent bonds. 
D) dipolar forces.

Question 3

A colligative property

Accepted Answer

A) will only occur for aqueous solutions. 
B) depends only on the number of species added to a solution. 
C) results from increasing vapor pressure as a solute is added to a solvent. 
D) All of the choices. 
A) will only occur for aqueous solutions. 
B) depends only on the number of species added to a solution. 
C) results from increasing vapor pressure as a solute is added to a solvent. 
D) All of the choices.

Question 4

​ Identify a condition under which a solute will not dissolve in a solvent.

Accepted Answer

A) The forces between solute particles can be overcome by interactions with solvent particles. 
B) The forces between solute particles are equal to the forces between the solvent particles. 
C) The solvent particles are more strongly attracted to each other than to solute particles. 
D) The solvent particles are weakly attracted to each other than to solute particles. 
A) The forces between solute particles can be overcome by interactions with solvent particles. 
B) The forces between solute particles are equal to the forces between the solvent particles. 
C) The solvent particles are more strongly attracted to each other than to solute particles. 
D) The solvent particles are weakly attracted to each other than to solute particles.

Question 5

As NH4NO3 dissolves in water, the resulting solution becomes colder. Which of the following expressions is most correct?

Accepted Answer

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

Question 6

Oil should be a good solvent for polar compounds.

Accepted Answer

A) True 
 B)False

Question 7

What is the osmotic pressure of a 0.050 M solution of AlCl3 in water that is at 0.00 ° C? Consider AlCl3 to be a strong electrolyte.

Accepted Answer

A) 8.5 × 102 torr 
B) 1.1 atm 
C) 2.2 atm 
D) 3.4 × 103 torr 
A) 8.5 × 102 torr 
B) 1.1 atm 
C) 2.2 atm 
D) 3.4 × 103 torr

Question 8

25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20 oC).  What is the % w\w for the ethyl alcohol in the resulting solution?

Accepted Answer

A) 10% 
B) 20% 
C) 25% 
D) 50% 
A) 10% 
B) 20% 
C) 25% 
D) 50%

Question 9

Which of the following would be considered a strong electrolyte?

Accepted Answer

A) salt 
B) sugar 
C) acetic acid 
D) all of the choices 
A) salt 
B) sugar 
C) acetic acid 
D) all of the choices

Question 10

The freezing point of a 0.500 M solution of sugar and a 0.500 M solution of KCl in water would be the same.

Accepted Answer

A) True 
 B)False

Question 11

The boiling point of a solution of sugar water is

Accepted Answer

A) higher than that of pure solvent. 
B) the same as that of pure solvent. 
C) lower than that of pure solvent. 
D) impossible to determine. 
A) higher than that of pure solvent. 
B) the same as that of pure solvent. 
C) lower than that of pure solvent. 
D) impossible to determine.

Question 12

Match between columns
                        Premises: Marshmallow

Accepted Answer

The Answer of Sol and  E mulsion and Foam is...

Question 13

When making some iced tea, you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 oC.  Based on this, what did you learn?

Accepted Answer

A) Based on the solubility, tea must be a nonpolar solvent. 
B) The solubility of table sugar in tea at 20 oC is 100 g\L 
C) Table sugar must be a strong electrolyte. 
D) You can dissolved 100 grams of sugar in tea at 20 oC 
A) Based on the solubility, tea must be a nonpolar solvent. 
B) The solubility of table sugar in tea at 20 oC is 100 g\L 
C) Table sugar must be a strong electrolyte. 
D) You can dissolved 100 grams of sugar in tea at 20 oC

Question 14

The dispersing medium in a colloid is analogous to the solvent in a solution.

Accepted Answer

A) True 
 B)False

Question 15

​ Explain the solubility of cooking oil in water and gasoline.

Accepted Answer

Cooking oil does not dissolve in water b

Question 16

An ion in solution that is surrounded by water is a(n)____ ion.

Accepted Answer

A) hydrated 
B) osmotic 
C) saturated 
D) colloid 
A) hydrated 
B) osmotic 
C) saturated 
D) colloid

Question 17

Polar substances tend to dissolve in non-polar solvents.

Accepted Answer

A) True 
 B)False

Question 18

What volume of a 10.00% (w\v)solution of sugar is needed to provide 2.00 g of sugar?

Accepted Answer

A) 0.200 liter 
B) 1.00 mL 
C) 20.0 mL 
D) 5.00 mL 
A) 0.200 liter 
B) 1.00 mL 
C) 20.0 mL 
D) 5.00 mL

Question 19

How many grams of solid KCl are needed to prepare 250 mL of 0.235 M solution?

Accepted Answer

A) 9.32 
B) 31.3 
C) 15.6 
D) 4.38 
A) 9.32 
B) 31.3 
C) 15.6 
D) 4.38

Question 20

The spores from many molds produce an allergic reaction in many individuals. If mold spores in the air were to be considered a colloid, which technique would remove the spores best from a functioning air conditioner duct?

Accepted Answer

A) Place a filter made from woven fiberglass fibers in the duct. 
B) Install an electrical device with both positive and negative poles. 
C) Install an ultraviolet light producing device in the duct. 
D) All of these responses work to the same extent. 
A) Place a filter made from woven fiberglass fibers in the duct. 
B) Install an electrical device with both positive and negative poles. 
C) Install an ultraviolet light producing device in the duct. 
D) All of these responses work to the same extent.

Exam 7: Solutions and Colloids

Which of the following pairs can produce a homogeneous mixture?

The primary intermolecular attractions between CH3-OH and H2O are

A colligative property

​ Identify a condition under which a solute will not dissolve in a solvent.

As NH4NO3 dissolves in water, the resulting solution becomes colder. Which of the following expressions is most correct?

Oil should be a good solvent for polar compounds.

What is the osmotic pressure of a 0.050 M solution of AlCl3 in water that is at 0.00 ° C? Consider AlCl3 to be a strong electrolyte.

25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20 oC). What is the % w\w for the ethyl alcohol in the resulting solution?

Which of the following would be considered a strong electrolyte?

The freezing point of a 0.500 M solution of sugar and a 0.500 M solution of KCl in water would be the same.

The boiling point of a solution of sugar water is

When making some iced tea, you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 oC. Based on this, what did you learn?

The dispersing medium in a colloid is analogous to the solvent in a solution.

​ Explain the solubility of cooking oil in water and gasoline.

An ion in solution that is surrounded by water is a(n)____ ion.

Polar substances tend to dissolve in non-polar solvents.

What volume of a 10.00% (w\v)solution of sugar is needed to provide 2.00 g of sugar?

How many grams of solid KCl are needed to prepare 250 mL of 0.235 M solution?

The spores from many molds produce an allergic reaction in many individuals. If mold spores in the air were to be considered a colloid, which technique would remove the spores best from a functioning air conditioner duct?

Matter, Measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Reaction Rates and Equilibrium

Acids, Bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

The primary intermolecular attractions between CH₃-OH and H₂O are

Identify a condition under which a solute will not dissolve in a solvent.

As NH₄NO₃ dissolves in water, the resulting solution becomes colder. Which of the following expressions is most correct?

What is the osmotic pressure of a 0.050 M solution of AlCl₃ in water that is at 0.00 ° C? Consider AlCl₃ to be a strong electrolyte.

25 g of ethyl alcohol is dissolved in 100 ml of water (density = 0.99993 at 20 ^oC). What is the % w\w for the ethyl alcohol in the resulting solution?

When making some iced tea, you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 ^oC. Based on this, what did you learn?

Explain the solubility of cooking oil in water and gasoline.