Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is not considered a colligative property?

Accepted Answer

A) vapor pressure 
B) boiling point 
C) conductivity 
D) freezing point 
A) vapor pressure 
B) boiling point 
C) conductivity 
D) freezing point

Question 3

Colloids are considered to be homogenous mixtures.

Accepted Answer

A) True 
 B)False

Question 4

Dialysis can be used to separate solutions from colloids.

Accepted Answer

A) True 
 B)False

Question 5

Which compound is most soluble in a polar solvent?

Accepted Answer

A) silver nitrate 
B) silver chloride 
C) silver carbonate 
D) all are of equal solubility 
A) silver nitrate 
B) silver chloride 
C) silver carbonate 
D) all are of equal solubility

Question 6

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 7

You discover that your roommate has left a half-full bottle of cola on the kitchen counter without replacing the cap - AGAIN!.Not surprisingly,the cola is now flat (all carbonation is gone).Why did this happen?

Accepted Answer

A) The solubility of the carbon dioxide gas in the cola has decreased due to it being left at a lower pressure. 
B) Warm bottles of cola will lose their carbonation faster than cold ones,even if the lid had been left on. 
C) Oxygen in the atmosphere reacts with the cola,eliminating the carbonation. 
D) The solubility of the carbon dioxide gas diffuses through the wall of the bottle. 
A) The solubility of the carbon dioxide gas in the cola has decreased due to it being left at a lower pressure. 
B) Warm bottles of cola will lose their carbonation faster than cold ones,even if the lid had been left on. 
C) Oxygen in the atmosphere reacts with the cola,eliminating the carbonation. 
D) The solubility of the carbon dioxide gas diffuses through the wall of the bottle.

Question 8

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 9

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 10

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 11

Putting a celery stick in distilled water results in the uptake of water by the celery.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

Accepted Answer

A) solvent/dispersed phase 
B) solute/dispersion medium 
C) solvent/dispersion medium 
D) more than one response is correct 
A) solvent/dispersed phase 
B) solute/dispersion medium 
C) solvent/dispersion medium 
D) more than one response is correct

Question 13

Weight-volume percentage solutions must be made in 100 mL increments.

Accepted Answer

A) True 
 B)False

Question 14

The rate of osmosis

Accepted Answer

A) can be increased by having larger pores in the membrane. 
B) can be increased by removing the membrane. 
C) can be increased by an increase in the atmospheric pressure. 
D) cannot be increased by any of the responses. 
A) can be increased by having larger pores in the membrane. 
B) can be increased by removing the membrane. 
C) can be increased by an increase in the atmospheric pressure. 
D) cannot be increased by any of the responses.

Question 15

The longer it takes for a substance to dissolve to form a solution,the lower its solubility will be.

Accepted Answer

A) True 
 B)False

Question 16

A mixture of sand and water would be an example of a colloidal suspension.

Accepted Answer

A) True 
 B)False

Question 17

The following equation can be used when C represents either a M or %(w/w)concentration.
CcVc = CdVd

Accepted Answer

A) True 
 B)False

Question 18

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.

Question 19

Polar substances tend to dissolve in non-polar solvents.

Accepted Answer

A) True 
 B)False

Question 20

Rock candy (large table sugar crystals)can be produced by allowing a hot,saturated solution of sugar in water to cool off.

Accepted Answer

A) True 
 B)False

Exam 7: Solutions and Colloids

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

Which of the following is not considered a colligative property?

Colloids are considered to be homogenous mixtures.

Dialysis can be used to separate solutions from colloids.

Which compound is most soluble in a polar solvent?

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

You discover that your roommate has left a half-full bottle of cola on the kitchen counter without replacing the cap - AGAIN!.Not surprisingly,the cola is now flat (all carbonation is gone).Why did this happen?

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 primary intermolecular attractions between CH3-OH and H2O are

Putting a celery stick in distilled water results in the uptake of water by the celery.

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

Weight-volume percentage solutions must be made in 100 mL increments.

The rate of osmosis

The longer it takes for a substance to dissolve to form a solution,the lower its solubility will be.

A mixture of sand and water would be an example of a colloidal suspension.

The following equation can be used when C represents either a M or %(w/w)concentration. CcVc = CdVd

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?

Polar substances tend to dissolve in non-polar solvents.

Rock candy (large table sugar crystals)can be produced by allowing a hot,saturated solution of sugar in water to cool off.

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

The following equation can be used when C represents either a M or %(w/w)concentration. C_cV_c = C_dV_d