Question 1

A salt water solution is 3.0%(w/w). How much of salt is there in a sample that weighs 250 g?

Accepted Answer

A)  1.2 g 
B)  1.5 g 
C)  3.0 g 
D)  7.5 g 
A)  1.2 g 
B)  1.5 g 
C)  3.0 g 
D)  7.5 g

Question 2

Which of the following is the equivalent of 13 mg of arsenic in 1 kg of drinking water?

Accepted Answer

A)  0.13 ppm arsenic 
B)  1.3 ppm arsenic 
C)  13.0 ppm arsenic 
D)  130.0 ppm arsenic 
A)  0.13 ppm arsenic 
B)  1.3 ppm arsenic 
C)  13.0 ppm arsenic 
D)  130.0 ppm arsenic

Question 3

Which of the following cannot serve as a solvent in a solution?

Accepted Answer

A)  a gas 
B)  a liquid 
C)  a solid 
D)  none of these 
A)  a gas 
B)  a liquid 
C)  a solid 
D)  none of these

Question 4

Which of the following solvents can dissolve appreciable amounts of sugar?

Accepted Answer

A)  benzene (C6H6) 
B)  water 
C)  both benzene (C6H6) and water 
D)  neither benzene (C6H6) 
A)  benzene (C6H6) 
B)  water 
C)  both benzene (C6H6) and water 
D)  neither benzene (C6H6)

Question 5

Which of the following will have the lowest freezing point?

Accepted Answer

A)  0.2 M acetic acid, CH3COOH, will have the lowest freezing point. 
B)  0.1 M potassium sulfate, K2SO4, will have the lowest freezing point. 
C)  0.2 M ethylene glycol, C2H6O2, will have the lowest freezing point. 
D)  All of these will have the same freezing point. 
A)  0.2 M acetic acid, CH3COOH, will have the lowest freezing point. 
B)  0.1 M potassium sulfate, K2SO4, will have the lowest freezing point. 
C)  0.2 M ethylene glycol, C2H6O2, will have the lowest freezing point. 
D)  All of these will have the same freezing point.

Question 6

Which of the following is true of electrodes?

Accepted Answer

A)  The anode is the positive electrode. 
B)  The cathode is the negative electrode. 
C)  The anode is the positive electrode and the cathode is the negative electrode. 
D)  None of these are true. 
A)  The anode is the positive electrode. 
B)  The cathode is the negative electrode. 
C)  The anode is the positive electrode and the cathode is the negative electrode. 
D)  None of these are true.

Question 7

Which of the following is true regarding the solubility of liquids and solids?

Accepted Answer

A)  Pressure has virtually no effect on the solubility of liquids or solids. 
B)  Solubility always decreases as pressure decreases. 
C)  Solubility always increases as pressure decreases. 
D)  Solubility usually decreases as pressure decreases. 
A)  Pressure has virtually no effect on the solubility of liquids or solids. 
B)  Solubility always decreases as pressure decreases. 
C)  Solubility always increases as pressure decreases. 
D)  Solubility usually decreases as pressure decreases.

Question 8

The label on a 750-mL bottle of wine states that its alcohol content is 12%(v/v). What volume of alcohol is present in the bottle?

Accepted Answer

A)  9.0 mL 
B)  90.0 mL 
C)  120 mL 
D)  180 mL 
A)  9.0 mL 
B)  90.0 mL 
C)  120 mL 
D)  180 mL

Question 9

Which of the following is an example of a colloid in which a liquid is dispersed in a liquid?

Accepted Answer

A)  butter 
B)  marshmallows 
C)  mayonnaise 
D)  whipped cream 
A)  butter 
B)  marshmallows 
C)  mayonnaise 
D)  whipped cream

Question 10

500 mL of salt water is prepared by dissolving 20 g of salt in water. What is the %(w/v) of this solution?

Accepted Answer

A)  0.04% 
B)  0.4% 
C)  4.0% 
D)  40.0% 
A)  0.04% 
B)  0.4% 
C)  4.0% 
D)  40.0%

Question 11

Which of the following factors causes colloidal particles to remain in solution without settling?

Accepted Answer

A)  Colloidal particles and solvent molecules are of the same size. 
B)  Colloidal particles have large solvation layers. 
C)  Colloidal particles and solvent molecules are of the same size and colloidal particles have large solvation layers. 
D)  None of these are correct. 
A)  Colloidal particles and solvent molecules are of the same size. 
B)  Colloidal particles have large solvation layers. 
C)  Colloidal particles and solvent molecules are of the same size and colloidal particles have large solvation layers. 
D)  None of these are correct.

Question 12

A chemist has a sample that is known to be a solution. Which of the following processes can be used to separate the components of the solution?

Accepted Answer

A)  distillation 
B)  filtration 
C)  distillation and filtration 
D)  neither distillation or filtration 
A)  distillation 
B)  filtration 
C)  distillation and filtration 
D)  neither distillation or filtration

Question 13

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2, in 1000.0 grams of water. What is the boiling point of the solution? (The boiling point elevation constant for water is 0.512°C/mole solute in 1000 g of water.)

Accepted Answer

A)  100.26°C 
B)  100.52°C 
C)  100.78°C 
D)  101.04°C 
A)  100.26°C 
B)  100.52°C 
C)  100.78°C 
D)  101.04°C

Question 14

Consider the following image of a separatory funnel. Which of the following correctly describes the contents of the funnel?

Accepted Answer

A)  The two liquids are insoluble in each other. 
B)  The two liquids are miscible. 
C)  The mixture is homogeneous. 
D)  All of these are correct. 
A)  The two liquids are insoluble in each other. 
B)  The two liquids are miscible. 
C)  The mixture is homogeneous. 
D)  All of these are correct.

Question 15

Which of the following is true of a solution?

Accepted Answer

A)  The components of a solution can be separated by filtration. 
B)  The components of a solution separate on standing. 
C)  The separation of a solution into its components is a chemical change. 
D)  The separation of a solution into its components is a physical change. 
A)  The components of a solution can be separated by filtration. 
B)  The components of a solution separate on standing. 
C)  The separation of a solution into its components is a chemical change. 
D)  The separation of a solution into its components is a physical change.

Question 16

What is the mass of BaCl2 in a 0.250-L bottle of 0.200 M BaCl2?

Accepted Answer

A)  5.21 g 
B)  10.4 g 
C)  41.7 g 
D)  52.1 g 
A)  5.21 g 
B)  10.4 g 
C)  41.7 g 
D)  52.1 g

Question 17

Which of the following combinations will always result in a solution?

Accepted Answer

A)  gas + gas 
B)  liquid + liquid 
C)  solid + solid 
D)  none of these 
A)  gas + gas 
B)  liquid + liquid 
C)  solid + solid 
D)  none of these

Question 18

What is the %(w/w) of a salt solution prepared by dissolving 7.5 g of salt in 242.5 g of water?

Accepted Answer

A)  0.030% 
B)  0.30% 
C)  0.75% 
D)  3.0% 
A)  0.030% 
B)  0.30% 
C)  0.75% 
D)  3.0%

Question 19

Consider the following image of a separatory funnel. If the liquid at the bottom layer is water, then which of the following liquids will be present at the top layer in the separatory funnel?

Accepted Answer

A)  carbon tetrachloride 
B)  gasoline 
C)  benzene 
D)  carbon tetrachloride or benzene 
E)  carbon tetrachloride, gasoline, or benzene 
A)  carbon tetrachloride 
B)  gasoline 
C)  benzene 
D)  carbon tetrachloride or benzene 
E)  carbon tetrachloride, gasoline, or benzene

Question 20

Which of the following gases is associated with the bends?

Accepted Answer

A)  CO2 
B)  NO2 
C)  N2 
D)  O2 
A)  CO2 
B)  NO2 
C)  N2 
D)  O2

Exam 6: Solutions and Colloids

A salt water solution is 3.0%(w/w). How much of salt is there in a sample that weighs 250 g?

Which of the following is the equivalent of 13 mg of arsenic in 1 kg of drinking water?

Which of the following cannot serve as a solvent in a solution?

Which of the following solvents can dissolve appreciable amounts of sugar?

Which of the following will have the lowest freezing point?

Which of the following is true of electrodes?

Which of the following is true regarding the solubility of liquids and solids?

The label on a 750-mL bottle of wine states that its alcohol content is 12%(v/v). What volume of alcohol is present in the bottle?

Which of the following is an example of a colloid in which a liquid is dispersed in a liquid?

500 mL of salt water is prepared by dissolving 20 g of salt in water. What is the %(w/v) of this solution?

Which of the following factors causes colloidal particles to remain in solution without settling?

A chemist has a sample that is known to be a solution. Which of the following processes can be used to separate the components of the solution?

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2, in 1000.0 grams of water. What is the boiling point of the solution? (The boiling point elevation constant for water is 0.512°C/mole solute in 1000 g of water.)

Consider the following image of a separatory funnel. Which of the following correctly describes the contents of the funnel?

Which of the following is true of a solution?

What is the mass of BaCl2 in a 0.250-L bottle of 0.200 M BaCl2?

Which of the following combinations will always result in a solution?

What is the %(w/w) of a salt solution prepared by dissolving 7.5 g of salt in 242.5 g of water?

Consider the following image of a separatory funnel. If the liquid at the bottom layer is water, then which of the following liquids will be present at the top layer in the separatory funnel?

Which of the following gases is associated with the bends?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl₂, in 1000.0 grams of water. What is the boiling point of the solution? (The boiling point elevation constant for water is 0.512°C/mole solute in 1000 g of water.)

What is the mass of BaCl₂ in a 0.250-L bottle of 0.200 M BaCl₂?