Question 1

Ionic compounds are generally insoluble in non-polar solvents.

Accepted Answer

A) True 
 B)False

Question 2

Changes in boiling point,freezing point,and vapor pressure are

Accepted Answer

A)  the same for 2 M NaCl as they are for 2 M CaCl2. 
B)  the same for 50 mL of 2 M NaCl as they are for 250 mL of 1 M NaCl. 
C)  the same for 75 mL of 2 M NaCl as they are for 50 mL of 2 M NaOH. 
D)  the same at 1 atm as at 1.55 atm. 
A)  the same for 2 M NaCl as they are for 2 M CaCl2. 
B)  the same for 50 mL of 2 M NaCl as they are for 250 mL of 1 M NaCl. 
C)  the same for 75 mL of 2 M NaCl as they are for 50 mL of 2 M NaOH. 
D)  the same at 1 atm as at 1.55 atm.

Question 3

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 4

When an ionic substance dissolves,the solvated ions will all always be surrounded by water molecules.

Accepted Answer

A) True 
 B)False

Question 5

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 6

The solubility of a substance can be measured in grams substance dissolved per liter of water.This is the same as expressing solubility in moles per liter.

Accepted Answer

A) True 
 B)False

Question 7

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 8

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water.When this solution is cooled to 15 °C what happens based on the following solubility plot for A.

Accepted Answer

A)  Solid A crystallizes and the solution is unsaturated. 
B)  Solid A dissolves and the solution is supersaturated. 
C)  Solid A crystallizes and the solution is saturated. 
D)  Solid A dissolves and the solution is unsaturated. 
A)  Solid A crystallizes and the solution is unsaturated. 
B)  Solid A dissolves and the solution is supersaturated. 
C)  Solid A crystallizes and the solution is saturated. 
D)  Solid A dissolves and the solution is unsaturated.

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

What is the molarity of a solution containing 0.325 moles of solute in 250 mL of solution?

Accepted Answer

A)  1.30*-3 
B)  1.30 
C)  0.769 
D)  8.13 *10-2 
A)  1.30*-3 
B)  1.30 
C)  0.769 
D)  8.13 *10-2

Question 11

The %(w/v)of a solution is defined as:

Accepted Answer

A) True 
 B)False

Question 12

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 13

Attractive forces between solute and solvent molecules are an important factor in solution formation.

Accepted Answer

A) True 
 B)False

Question 14

A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

Accepted Answer

A)  0.260 
B)  0.163 
C)  6.50 
D)  1.24 
A)  0.260 
B)  0.163 
C)  6.50 
D)  1.24

Question 15

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 16

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 17

When preparing an aqueous solution of a salt,one must always be able to observe some undissolved material to be sure that it is saturated.

Accepted Answer

A) True 
 B)False

Question 18

Drinking water can be purified by which of the following methods?

Accepted Answer

A)  reverse osmosis 
B)  distillation 
C)  ion exchange 
D)  all of the choices 
A)  reverse osmosis 
B)  distillation 
C)  ion exchange 
D)  all of the choices

Question 19

A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution.What is the % (v/v)of oil in the solution?

Accepted Answer

A)  30.0 
B)  23.1 
C)  42.9 
D)  3.33 
A)  30.0 
B)  23.1 
C)  42.9 
D)  3.33

Question 20

The solubility of gases in water increases with increasing temperature.

Accepted Answer

A) True 
 B)False

Exam 7: Solutions and Colloids

Ionic compounds are generally insoluble in non-polar solvents.

Changes in boiling point,freezing point,and vapor pressure are

The primary intermolecular attractions between CH3-OH and H2O are

When an ionic substance dissolves,the solvated ions will all always be surrounded by water molecules.

The rate of osmosis

The solubility of a substance can be measured in grams substance dissolved per liter of water.This is the same as expressing solubility in moles per liter.

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.

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water.When this solution is cooled to 15 °C what happens based on the following solubility plot for A.

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

What is the molarity of a solution containing 0.325 moles of solute in 250 mL of solution?

The %(w/v)of a solution is defined as:

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

Attractive forces between solute and solvent molecules are an important factor in solution formation.

A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

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

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

When preparing an aqueous solution of a salt,one must always be able to observe some undissolved material to be sure that it is saturated.

Drinking water can be purified by which of the following methods?

A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution.What is the % (v/v)of oil in the solution?

The solubility of gases in water increases with increasing temperature.

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

A solution is prepared by adding 25.0 mL of 1.30 M AlCl₃ solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

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