Question 1

Dinitrogen monoxide is still used as a general anesthetic.The Henry's law constant for the solubility of N2O in water is 2.5 × 10-2 mol/L·atm.What is the molar solubility of N2O in water if the partial pressure of N2O is 1700 mm Hg?

Accepted Answer

Question 2

For a liquid solution made by dissolving a solid or a gas in a liquid,the

Accepted Answer

A)  liquid is the solute.
B)  liquid is the solvent.
C)  solute is the component present in the greatest amount.
D)  solvent is the component present in the greatest amount.E) B) and C)
F) None of the above

Question 3

-Which drawing above represents the system with the highest entropy?

Accepted Answer

A)  drawing (a) 
B)  drawing (b) 
C)  drawing (c) 
D)  drawing (d) E) B) and C)
F) All of the above

Question 4

A gold ring is an example of a ________ solution.

Accepted Answer

A)  gas/gas
B)  liquid/solid
C)  solid/lliquid
D)  solid/solidE) B) and C)
F) A) and B)

Question 5

Commercial cold packs often contain solid NH4NO3 and a pouch of water.The temperature of the pack drops as the NH4NO3 dissolves in water.Therefore,for the dissolving of NH4NO3 in water,

Accepted Answer

A)  ΔHsoln is negative and ΔSsoln may be negative or positive.
B)  ΔHsoln is negative and ΔSsoln is positive.
C)  ΔHsoln is positive and ΔSsoln may be negative or positive.
D)  ΔHsoln is positive and ΔSsoln is positive.E) C) and D)
F) B) and D)

Question 6

-Which drawing above represents the system with the second lowest entropy?

Accepted Answer

A)  drawing (a) 
B)  drawing (b) 
C)  drawing (c) 
D)  drawing (d) E) None of the above
F) A) and C)

Question 7

The osmotic pressure of a 100-mL solution containing 1.0 g of sucrose,C12H22O11 will be ________ (equal to,greater than,less than)the osmotic pressure of a 100-mL solution containing 1.0 g of fructose,C6H12O6.

Accepted Answer

Question 8

Drawing (1) shows a nonequilibrium system comprised of pure water separated from an aqueous solution by a semipermeable membrane.Shaded spheres represent solute particles and unshaded spheres represent water molecules.Which drawing (2) -(5) represents this system after equilibrium is reached?

Accepted Answer

A)  drawing (2) 
B)  drawing (3) 
C)  drawing (4) 
D)  drawing (5) E) None of the above
F) B) and C)

Question 9

Substances with high lattice energies tend to be less soluble than substances with low lattice energies.On that basis predict the relative aqueous solubility at 20°C,from highest to lowest,of the following ionic compounds: 2(SO4) 3 > Li2SO4 > KBr > LiCl B) Fe2(SO4) 3 > Li2SO4 > LiCl > KBr C) KBr > LiCl > Li2SO4 > Fe2(SO4) 3 D) LiCl > KBr > Li2SO4 > Fe2(SO4) 3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Fe2(SO4) 3 > Li2SO4 > KBr > LiCl
B)  Fe2(SO4) 3 > Li2SO4 > LiCl > KBr
C)  KBr > LiCl > Li2SO4 > Fe2(SO4) 3
D)  LiCl > KBr > Li2SO4 > Fe2(SO4) 3E) A) and C)
F) C) and D)

Question 10

Calculate the molality of a solution with 53 grams of KCl in 2000 mL of water.(density of water is 1.00 g/mL) .

Accepted Answer

A)  0.027
B)  0.27
C)  0.00071
D)  0.0027E) B) and C)
F) A) and B)

Question 11

What is the molality of a glucose solution prepared by dissolving 9.00 g of glucose,C6H12O6,in 125.9 g of water?

Accepted Answer

A)  2.38 × 10-4 m
B)  0.0715 m
C)  0.347 m
D)  0.397 mE) B) and D)
F) A) and B)

Question 12

Which is not a solution?

Accepted Answer

A)  sterling silver
B)  fog
C)  hydrochloric acid
D)  coffeeE) A) and B)
F) None of the above

Question 13

For which case would ΔHsoln be expected to be negative?

Accepted Answer

A)  if solute-solute interactions are much greater than solvent-solvent and solute-solvent interactions
B)  if solvent-solvent interactions are much greater than solute-solvent and solute-solute interactions
C)  if solute-solvent interactions are much greater than solvent-solvent and solute-solute interactions
D)  if solute-solvent interactions are the same as solvent-solvent and solute-solute interactionsE) None of the above
F) A) and B)

Question 14

-Which drawing above represents the system with the second highest entropy?

Accepted Answer

A)  drawing (a) 
B)  drawing (b) 
C)  drawing (c) 
D)  drawing (d) E) C) and D)
F) A) and B)

Question 15

The volume of 0.200 M H2SO4 that contains 5.00 mmol of H+ is ________ mL.

Accepted Answer

Question 16

When KI is dissolved in water,the major forces overcome are ________ forces in the solute and ________ forces in the solvent,and the major forces created between solute and solvent particles are ________ forces.

Accepted Answer

ionic bond...

Question 17

A 1.40 M solution of CaCl2 in water has a density of 1.11 g/mL.What is the molality?

Accepted Answer

A)  1.90 m CaCl2
B)  2.30 m CaCl2
C)  1.47 m CaCl2
D)  1.44 m CaCl2E) A) and B)
F) B) and C)

Question 18

At 25°C the vapor pressures of benzene and toluene are 96.0 mm Hg and 30.5 mm Hg,respectively.When a 1:1 molar mixture of benzene and toluene is fractionally distilled,the first fraction will have a mole fraction of benzene that is closest to

Accepted Answer

A)  0.0.
B)  0.5.
C)  0.7.
D)  1.0.E) C) and D)
F) A) and C)

Question 19

If one mole of each is dissolved in 1.00 L of water,which will lower the vapor pressure the most?

Accepted Answer

A)  C12H22O11
B)  KNO3
C)  C3H7OH
D)  MgCl2E) B) and D)
F) None of the above

Question 20

Which of the following is not an application of colligative properties?

Accepted Answer

A)  adding silver to mercury to lower the vapor pressure of mercury
B)  desalinating sea water by reverse osmosis
C)  melting snow by application of salt
D)  reduced boiling points of pure liquids at increased altitudesE) B) and C)
F) A) and D)

Exam 12: Solutions and Their Properties

Drawing (1) shows a nonequilibrium system comprised of pure water separated from an aqueous solution by a semipermeable membrane.Shaded spheres represent solute particles and unshaded spheres represent water molecules.Which drawing (2) -(5) represents this system after equilibrium is reached?

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Which is not a solution?

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Commercial cold packs often contain solid NH4NO3 and a pouch of water.The temperature of the pack drops as the NH4NO3 dissolves in water.Therefore,for the dissolving of NH4NO3 in water,

Correct AnswerverifiedShow Answer

Which of the following is not an application of colligative properties?

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The volume of 0.200 M H2SO4 that contains 5.00 mmol of H+ is ________ mL.

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-Which drawing above represents the system with the second highest entropy?

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A gold ring is an example of a ________ solution.

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When KI is dissolved in water,the major forces overcome are ________ forces in the solute and ________ forces in the solvent,and the major forces created between solute and solvent particles are ________ forces.

Correct Answerverifiedionic bond...View AnswerShow Answer

-Which drawing above represents the system with the highest entropy?

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-Which drawing above represents the system with the second lowest entropy?

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At 25°C the vapor pressures of benzene and toluene are 96.0 mm Hg and 30.5 mm Hg,respectively.When a 1:1 molar mixture of benzene and toluene is fractionally distilled,the first fraction will have a mole fraction of benzene that is closest to

Correct AnswerverifiedShow Answer

Calculate the molality of a solution with 53 grams of KCl in 2000 mL of water.(density of water is 1.00 g/mL) .

Correct AnswerverifiedShow Answer

If one mole of each is dissolved in 1.00 L of water,which will lower the vapor pressure the most?

Correct AnswerverifiedShow Answer

For which case would ΔHsoln be expected to be negative?

Correct AnswerverifiedShow Answer

For a liquid solution made by dissolving a solid or a gas in a liquid,the

Correct AnswerverifiedShow Answer

A 1.40 M solution of CaCl2 in water has a density of 1.11 g/mL.What is the molality?

Correct AnswerverifiedShow Answer

Substances with high lattice energies tend to be less soluble than substances with low lattice energies.On that basis predict the relative aqueous solubility at 20°C,from highest to lowest,of the following ionic compounds:

Correct AnswerverifiedShow Answer

The osmotic pressure of a 100-mL solution containing 1.0 g of sucrose,C12H22O11 will be ________ (equal to,greater than,less than)the osmotic pressure of a 100-mL solution containing 1.0 g of fructose,C6H12O6.

Correct AnswerverifiedShow Answer

Dinitrogen monoxide is still used as a general anesthetic.The Henry's law constant for the solubility of N2O in water is 2.5 × 10-2 mol/L·atm.What is the molar solubility of N2O in water if the partial pressure of N2O is 1700 mm Hg?

Correct AnswerverifiedShow Answer

What is the molality of a glucose solution prepared by dissolving 9.00 g of glucose,C6H12O6,in 125.9 g of water?

Correct AnswerverifiedShow Answer

Correct Answer
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Commercial cold packs often contain solid NH₄NO₃ and a pouch of water.The temperature of the pack drops as the NH₄NO₃ dissolves in water.Therefore,for the dissolving of NH₄NO₃ in water,

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The volume of 0.200 M H₂SO₄ that contains 5.00 mmol of H⁺ is ________ mL.

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When KI is dissolved in water,the major forces overcome are forces in the solute and forces in the solvent,and the major forces created between solute and solvent particles are forces.

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ionic bond...
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For which case would ΔH_soln be expected to be negative?

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A 1.40 M solution of CaCl₂ in water has a density of 1.11 g/mL.What is the molality?

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The osmotic pressure of a 100-mL solution containing 1.0 g of sucrose,C₁₂H₂₂O₁₁will be ________ (equal to,greater than,less than)the osmotic pressure of a 100-mL solution containing 1.0 g of fructose,C₆H₁₂O₆.

Correct Answer
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Dinitrogen monoxide is still used as a general anesthetic.The Henry's law constant for the solubility of N₂O in water is 2.5 × 10^-2 mol/L·atm.What is the molar solubility of N₂O in water if the partial pressure of N₂O is 1700 mm Hg?

Correct Answer
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What is the molality of a glucose solution prepared by dissolving 9.00 g of glucose,C₆H₁₂O₆,in 125.9 g of water?

Correct Answer
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