Question 1

Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion?

Accepted Answer

A)  the addition of a solvent that has a great affinity for water 
B)  the addition of an electrolyte 
C)  the addition of a solvent that has a great affinity for water and the addition of an electrolyte 
D)  neither of these 
A)  the addition of a solvent that has a great affinity for water 
B)  the addition of an electrolyte 
C)  the addition of a solvent that has a great affinity for water and the addition of an electrolyte 
D)  neither of these C

Question 2

To which of the following solvent-solute combinations does the term "miscible" apply?

Accepted Answer

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

Question 3

Which of the following is the definition of molarity?

Accepted Answer

A)  moles of solute/1000 grams of solvent 
B)  moles of solute/liter of solution 
C)  moles of solute/liter of solvent 
D)  moles of solvent/1000 grams of solute 
A)  moles of solute/1000 grams of solvent 
B)  moles of solute/liter of solution 
C)  moles of solute/liter of solvent 
D)  moles of solvent/1000 grams of solute B

Question 4

Which of the following is associated with gout?

Accepted Answer

A)  anhydrous calcium sulfate 
B)  anhydrous sodium urate 
C)  calcium sulfate dihydrate 
D)  sodium urate monohydrate 
A)  anhydrous calcium sulfate 
B)  anhydrous sodium urate 
C)  calcium sulfate dihydrate 
D)  sodium urate monohydrate

Question 5

What is the solubility of table salt in water at 30°C?

Accepted Answer

A)  16.2 g per 100.0 g of water 
B)  26.2 g per 100.0 g of water 
C)  36.2 g per 100.0 g of water 
D)  46.2 g per 100.0 g of water 
A)  16.2 g per 100.0 g of water 
B)  26.2 g per 100.0 g of water 
C)  36.2 g per 100.0 g of water 
D)  46.2 g per 100.0 g of water

Question 6

A solution of iodine in carbon tetrachloride is 0.100 M. How much of carbon tetrachloride must be added to 50.0 mL of this solution to reduce the concentration to 0.0250 M? (Assume volumes are additive.)

Accepted Answer

A)  50.0 mL 
B)  100.0 mL 
C)  150.0 mL 
D)  200.0 mL 
A)  50.0 mL 
B)  100.0 mL 
C)  150.0 mL 
D)  200.0 mL

Question 7

A solution is prepared by dissolving 3.50 grams of NH4Cl in enough water to make 250.0 mL of solution. What is the concentration of this solution?

Accepted Answer

A)  0.0327 M 
B)  0.0654 M 
C)  0.131 M 
D)  0.262 M 
A)  0.0327 M 
B)  0.0654 M 
C)  0.131 M 
D)  0.262 M

Question 8

When a certain clear red-brown liquid is distilled, we recover a clear liquid and a red-brown solid. What can be said about the red-brown liquid?

Accepted Answer

A)  It is an element. 
B)  It is a compound. 
C)  It is a solution. 
D)  We cannot determine if it is an element, a compound, or a solution. 
A)  It is an element. 
B)  It is a compound. 
C)  It is a solution. 
D)  We cannot determine if it is an element, a compound, or a solution.

Question 9

Which statement is true of the stabilities of colloidal systems and suspensions?

Accepted Answer

A)  Colloidal systems are stable, but suspensions are not. 
B)  Suspensions are stable, but colloidal systems are not. 
C)  Both colloidal systems and suspensions are stable. 
D)  Both colloidal systems and suspensions are unstable. 
A)  Colloidal systems are stable, but suspensions are not. 
B)  Suspensions are stable, but colloidal systems are not. 
C)  Both colloidal systems and suspensions are stable. 
D)  Both colloidal systems and suspensions are unstable.

Question 10

Which of the following is true of hygroscopic crystals?

Accepted Answer

A)  They are anhydrous crystals that become hydrated upon standing in air. 
B)  They are hydrated crystals that become anhydrous upon standing in air. 
C)  They are anhydrous crystals that continue to remain the same even when exposed to air. 
D)  They are hydrated crystals that continue to remain the same even when exposed to air. 
A)  They are anhydrous crystals that become hydrated upon standing in air. 
B)  They are hydrated crystals that become anhydrous upon standing in air. 
C)  They are anhydrous crystals that continue to remain the same even when exposed to air. 
D)  They are hydrated crystals that continue to remain the same even when exposed to air.

Question 11

Which of the following occurs when red blood cells are placed in a hypotonic solution?

Accepted Answer

A)  crenation 
B)  hemolysis 
C)  reverse osmosis 
D)  none of these 
A)  crenation 
B)  hemolysis 
C)  reverse osmosis 
D)  none of these

Question 12

Which of the following is true when comparing a dialysis membrane with an osmotic semipermeable membrane?

Accepted Answer

A)  Both membranes allow solute particles to pass through. 
B)  An osmotic semipermeable membrane has larger openings than a dialysis membrane. 
C)  Both membranes allow solute particles to pass through and an osmotic semipermeable membrane has larger openings than a dialysis membrane. 
D)  None of these. 
A)  Both membranes allow solute particles to pass through. 
B)  An osmotic semipermeable membrane has larger openings than a dialysis membrane. 
C)  Both membranes allow solute particles to pass through and an osmotic semipermeable membrane has larger openings than a dialysis membrane. 
D)  None of these.

Question 13

What volume of 12.0 M HCl must be used to make 300.0 mL of 0.600 M HCl?

Accepted Answer

A)  1.50 mL 
B)  2.40 mL 
C)  15.0 mL 
D)  24.0 mL 
A)  1.50 mL 
B)  2.40 mL 
C)  15.0 mL 
D)  24.0 mL

Question 14

What is the maximum diameter of solute particles in a true solution?

Accepted Answer

A)  1 pm 
B)  1 nm 
C)  1 fm 
D)  1 mm 
A)  1 pm 
B)  1 nm 
C)  1 fm 
D)  1 mm

Question 15

Which of the following does not change in a solution post dilution?

Accepted Answer

A)  the number of moles of solvent 
B)  the number of moles of solute 
C)  the volume of the solution 
D)  the molarity of the solution 
A)  the number of moles of solvent 
B)  the number of moles of solute 
C)  the volume of the solution 
D)  the molarity of the solution

Question 16

What is the molar mass of CuSO4·5H2O?

Accepted Answer

A)  90.0 g/mol 
B)  177.6 g/mol 
C)  159.6 g/mol 
D)  249.6 g/mol 
A)  90.0 g/mol 
B)  177.6 g/mol 
C)  159.6 g/mol 
D)  249.6 g/mol

Question 17

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)  chromatography 
B)  distillation 
C)  either chromatography or distillation 
D)  neither chromatography or distillation 
A)  chromatography 
B)  distillation 
C)  either chromatography or distillation 
D)  neither chromatography or distillation

Question 18

Which of the following will have the lowest freezing point?

Accepted Answer

A)  0.1 M ethylene glycol, C2H6O2, will have the lowest freezing point. 
B)  0.1 M glucose, C6H12O6, will have the lowest freezing point. 
C)  0.1 M sucrose, C12H22O11, will have the lowest freezing point. 
D)  All of these will have the same freezing point. 
A)  0.1 M ethylene glycol, C2H6O2, will have the lowest freezing point. 
B)  0.1 M glucose, C6H12O6, will have the lowest freezing point. 
C)  0.1 M sucrose, C12H22O11, will have the lowest freezing point. 
D)  All of these will have the same freezing point.

Question 19

Which of the following solutions has the highest osmolarity?

Accepted Answer

A)  0.1 M NaCl has the highest osmolarity. 
B)  0.1 M BaCl2 has the highest osmolarity. 
C)  0.1 M AlCl3 has the highest osmolarity. 
D)  All of these have the same osmolarity. 
A)  0.1 M NaCl has the highest osmolarity. 
B)  0.1 M BaCl2 has the highest osmolarity. 
C)  0.1 M AlCl3 has the highest osmolarity. 
D)  All of these have the same osmolarity.

Question 20

What is the osmolarity of a 3.3%(w/v) Na3PO4 solution?

Accepted Answer

A)  0.20 osmol 
B)  0.40 osmol 
C)  0.80 osmol 
D)  1.6 osmol 
A)  0.20 osmol 
B)  0.40 osmol 
C)  0.80 osmol 
D)  1.6 osmol

Exam 6: Solutions and Colloids

Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion?

To which of the following solvent-solute combinations does the term "miscible" apply?

Which of the following is the definition of molarity?

Which of the following is associated with gout?

What is the solubility of table salt in water at 30°C?

A solution of iodine in carbon tetrachloride is 0.100 M. How much of carbon tetrachloride must be added to 50.0 mL of this solution to reduce the concentration to 0.0250 M? (Assume volumes are additive.)

A solution is prepared by dissolving 3.50 grams of NH4Cl in enough water to make 250.0 mL of solution. What is the concentration of this solution?

When a certain clear red-brown liquid is distilled, we recover a clear liquid and a red-brown solid. What can be said about the red-brown liquid?

Which statement is true of the stabilities of colloidal systems and suspensions?

Which of the following is true of hygroscopic crystals?

Which of the following occurs when red blood cells are placed in a hypotonic solution?

Which of the following is true when comparing a dialysis membrane with an osmotic semipermeable membrane?

What volume of 12.0 M HCl must be used to make 300.0 mL of 0.600 M HCl?

What is the maximum diameter of solute particles in a true solution?

Which of the following does not change in a solution post dilution?

What is the molar mass of CuSO4·5H2O?

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?

Which of the following will have the lowest freezing point?

Which of the following solutions has the highest osmolarity?

What is the osmolarity of a 3.3%(w/v) Na3PO4 solution?

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

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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

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Filters

A solution is prepared by dissolving 3.50 grams of NH₄Cl in enough water to make 250.0 mL of solution. What is the concentration of this solution?

What is the molar mass of CuSO₄·5H₂O?

What is the osmolarity of a 3.3%(w/v) Na₃PO₄ solution?