Question 1

Which of the following is true regarding the solubility of gases?

Accepted Answer

A)  Solubility always decreases as pressure increases. 
B)  Solubility always increases as pressure increases. 
C)  Solubility usually decreases as pressure increases. 
D)  Solubility usually increases as pressure increases. 
A)  Solubility always decreases as pressure increases. 
B)  Solubility always increases as pressure increases. 
C)  Solubility usually decreases as pressure increases. 
D)  Solubility usually increases as pressure increases.

Question 2

A chemist has a sample which is known to be a solution. Which of the following might be used to separate the components of the solution?

Accepted Answer

A)  chromatography 
B)  filtration 
C)  either a or b 
D)  neither a nor b 
A)  chromatography 
B)  filtration 
C)  either a or b 
D)  neither a nor b

Question 3

Which of the following is a description of a hydrated salt?

Accepted Answer

A)  a salt which is insoluble in water 
B)  a salt which is soluble in water 
C)  a salt with no water incorporated in its crystal structure 
D)  a salt with water incorporated in its crystal structure 
A)  a salt which is insoluble in water 
B)  a salt which is soluble in water 
C)  a salt with no water incorporated in its crystal structure 
D)  a salt with water incorporated in its crystal structure

Question 4

Which laboratory equipment is needed to prepare solutions of known %(v/v)?

Accepted Answer

A)  a graduated cylinder 
B)  a volumetric flask 
C)  both a and b 
D)  neither a nor b 
A)  a graduated cylinder 
B)  a volumetric flask 
C)  both a and b 
D)  neither a nor b

Question 5

Which of the following solutions has the highest osmolarity?

Accepted Answer

A)  0.20 M NaCl 
B)  0.15 M BaCl2 
C)  0.10 M AlCl3 
D)  All have the same osmolarity. 
A)  0.20 M NaCl 
B)  0.15 M BaCl2 
C)  0.10 M AlCl3 
D)  All have the same osmolarity.

Question 6

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 7

Of the ions Cl-, Na+, NH4+ and NO3-, which will move towards the anode?

Accepted Answer

A)  only chloride ions 
B)  only sodium ions 
C)  both chloride ions and nitrate ions 
D)  both the sodium ion and ammonium ions 
A)  only chloride ions 
B)  only sodium ions 
C)  both chloride ions and nitrate ions 
D)  both the sodium ion and ammonium ions

Question 8

Which of the following is true of electrolytes?

Accepted Answer

A)  All electrolytes have mobile ions. 
B)  All electrolytes contain equal numbers of cations and anions. 
C)  both a and b 
D)  neither a nor b 
A)  All electrolytes have mobile ions. 
B)  All electrolytes contain equal numbers of cations and anions. 
C)  both a and b 
D)  neither a nor b

Question 9

What is the mass of NaCl in a 0.500 L bottle of 2.00 M NaCl?

Accepted Answer

A)  29.3 g 
B)  58.5 g 
C)  117 g 
D)  234 g 
A)  29.3 g 
B)  58.5 g 
C)  117 g 
D)  234 g

Question 10

Thermal pollution generally refers to which of the following?

Accepted Answer

A)  the decrease in the O2 content of warm water as compared to cold water 
B)  the increase in the O2 content of cold water as compared to warm water 
C)  both a and b 
D)  neither a nor b 
A)  the decrease in the O2 content of warm water as compared to cold water 
B)  the increase in the O2 content of cold water as compared to warm water 
C)  both a and b 
D)  neither a nor b

Question 11

Given three solutions, each of which contains 1.0 g of solute dissolved in 100 mL of water, which of the following solutes will cause the solution to have the lowest freezing point?

Accepted Answer

A)  ribose, C5H10O5 
B)  glucose, C6H12O6 
C)  sucrose, C12H22O11 
D)  All have the same freezing point. 
A)  ribose, C5H10O5 
B)  glucose, C6H12O6 
C)  sucrose, C12H22O11 
D)  All have the same freezing point.

Question 12

Which of the following is a description of an anhydrous salt?

Accepted Answer

A)  a salt which is insoluble in water 
B)  a salt which is soluble in water 
C)  a salt with no water incorporated in its crystal structure 
D)  a salt with water incorporated in its crystal structure 
A)  a salt which is insoluble in water 
B)  a salt which is soluble in water 
C)  a salt with no water incorporated in its crystal structure 
D)  a salt with water incorporated in its crystal structure

Question 13

Which of the following will have the lowest freezing point?

Accepted Answer

A)  0.1 M NaCl 
B)  0.1 M BaCl2 
C)  0.1 M AlCl3 
D)  All have the same freezing point. 
A)  0.1 M NaCl 
B)  0.1 M BaCl2 
C)  0.1 M AlCl3 
D)  All have the same freezing point.

Question 14

Which of the following solutions of glucose is isotonic with a 0.15 M NaCl solution?

Accepted Answer

A)  0.15% 
B)  0.55% 
C)  1.5% 
D)  5.5% 
A)  0.15% 
B)  0.55% 
C)  1.5% 
D)  5.5%

Question 15

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

Accepted Answer

A)  Colloidal particles are of the same size of solvent molecules. 
B)  Colloidal particles have large solvation layers. 
C)  both a and b 
D)  neither a nor b 
A)  Colloidal particles are of the same size of solvent molecules. 
B)  Colloidal particles have large solvation layers. 
C)  both a and b 
D)  neither a nor b

Question 16

Which of the following aqueous solutions of Na2SO4 is hypotonic with respect to a 0.15 M NaCl solution?

Accepted Answer

A)  0.05 M 
B)  0.10 M 
C)  0.15 M 
D)  none of these 
A)  0.05 M 
B)  0.10 M 
C)  0.15 M 
D)  none of these

Question 17

Which of the following is true regarding the solubility of gases in liquids?

Accepted Answer

A)  Solubility decreases as temperature increases. 
B)  Solubility increases as temperature increases. 
C)  Solubility is unaffected by changes in temperature. 
A)  Solubility decreases as temperature increases. 
B)  Solubility increases as temperature increases. 
C)  Solubility is unaffected by changes in temperature.

Question 18

A typical sample of brass is 67% (w/w) copper and 33% (w/w) zinc. How many moles of zinc are dissolved in 67 grams of copper?

Accepted Answer

A)  0.33 mol 
B)  0.50 mol 
C)  0.67 mol 
D)  1.0 mol 
A)  0.33 mol 
B)  0.50 mol 
C)  0.67 mol 
D)  1.0 mol

Question 19

Which of the following is intermediate between homogenous and heterogeneous mixtures?

Accepted Answer

A)  alloys 
B)  colloidal dispersions 
C)  plastics 
D)  polymers 
A)  alloys 
B)  colloidal dispersions 
C)  plastics 
D)  polymers

Question 20

Which of the following is true when HCl(g) dissolves in water?

Accepted Answer

A)  The HCl(g) reacts with the water. 
B)  The solution is a strong electrolyte. 
C)  both a and b 
D)  neither a nor b 
A)  The HCl(g) reacts with the water. 
B)  The solution is a strong electrolyte. 
C)  both a and b 
D)  neither a nor b

Exam 6: Solutions and Colloids

Which of the following is true regarding the solubility of gases?

A chemist has a sample which is known to be a solution. Which of the following might be used to separate the components of the solution?

Which of the following is a description of a hydrated salt?

Which laboratory equipment is needed to prepare solutions of known %(v/v)?

Which of the following solutions has the highest osmolarity?

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

Of the ions Cl-, Na+, NH4+ and NO3-, which will move towards the anode?

Which of the following is true of electrolytes?

What is the mass of NaCl in a 0.500 L bottle of 2.00 M NaCl?

Thermal pollution generally refers to which of the following?

Given three solutions, each of which contains 1.0 g of solute dissolved in 100 mL of water, which of the following solutes will cause the solution to have the lowest freezing point?

Which of the following is a description of an anhydrous salt?

Which of the following will have the lowest freezing point?

Which of the following solutions of glucose is isotonic with a 0.15 M NaCl solution?

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

Which of the following aqueous solutions of Na2SO4 is hypotonic with respect to a 0.15 M NaCl solution?

Which of the following is true regarding the solubility of gases in liquids?

A typical sample of brass is 67% (w/w) copper and 33% (w/w) zinc. How many moles of zinc are dissolved in 67 grams of copper?

Which of the following is intermediate between homogenous and heterogeneous mixtures?

Which of the following is true when HCl(g) dissolves in water?

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 and Alkynes

Benzene and Its Derivatives

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

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

Of the ions Cl-, Na⁺, NH₄⁺ and NO₃-, which will move towards the anode?

Which of the following aqueous solutions of Na₂SO₄ is hypotonic with respect to a 0.15 M NaCl solution?