Question 1

It would be expected that methanol (CH3OH)would be more soluble in water than methane (CH4)would be.

Accepted Answer

A) True 
 B)False

Question 2

The oxygen in the air we breath is classified as:

Accepted Answer

A)  the solute in a homogeneous gas mixture.
B)  the solvent in a homogeneous gas mixture.
C)  the solute in a heterogeneous gas-liquid mixture.
D)  the solvent in a simple mixture.
E)  none of the above A

Question 3

How many milliliters of 0.755 M H2SO4 solution is needed to react with 55.0 mL of 2.50 M KOH solution?
Given: 2 KOH (aq) + H2SO4 (aq) → 2 H2O (l) + K2SO4 (aq)

Accepted Answer

A)  51.9 mL
B)  182 mL
C)  91.1 mL
D)  17200 mL
E)  none of the above

Question 4

A supersaturated solution is unstable and crystallization usually occurs.

Accepted Answer

A) True 
 B)False

Question 5

The solubility of Pb(NO3) 2 is 55 grams per 100 g H2O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO3) 2 is added to 100 grams of water at this temperature?

Accepted Answer

A)  insoluble
B)  unsaturated
C)  saturated
D)  supersaturated
E)  none of the above

Question 6

The fact that the oceans contain salt water shows that polar solvents dissolve ionic solutes.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following aqueous solutions would be expected to freeze at the lowest temperature?

Accepted Answer

A)  1 molal KNO3
B)  1 molal NaCl
C)  1 molal CaCl2
D)  1 molal C6H12O6 (fructose) 
E)  All of these solutions would freeze at the same temperature.

Question 8

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl2 solution:

Accepted Answer

A)  the NaCl solution has the higher boiling point and the lower freezing point.
B)  the CaCl2 solution has the higher boiling point and the lower freezing point.
C)  the NaCl solution has the higher boiling point and the CaCl2 solution has the lower freezing point.
D)  the CaCl2 solution has the higher boiling point and the NaCl solution has the lower freezing point.
E)  both solutions have the same boiling point and the same freezing point. B

Question 9

A solution contains 100.0 g water,10.0 g NaCl,and 15.0 g methanol.What is the mass percent of methanol in the solution?

Accepted Answer

A)  8.00%
B)  10.0%
C)  12.0%
D)  15.0%
E)  none of the above

Question 10

The solubility of solids in water:

Accepted Answer

A)  is independent of pressure above solution.
B)  increases with increasing pressure above solution.
C)  decreases with increasing pressure above solution.
D)  Solids are not soluble in water.
E)  none of the above

Question 11

If you prepare a solution by adding sufficient amount of solute so that after heating and cooling the solution there is a visible amount of solid solute left in the bottom of the beaker,the solution would be considered ________.

Accepted Answer

A)  unsaturated
B)  saturated
C)  supersaturated
D)  thermally saturated
E)  none of the above

Question 12

The solubility of gases in water decreases with increasing temperature.

Accepted Answer

A) True 
 B)False  True

Question 13

Calculate the molarity of a KCl solution made by dissolving 24.7 g of KCl in a total volume of 
.

Accepted Answer

A)  0.331
B)  0.663
C)  0.166
D)  6.04
E)  none of the above

Question 14

What is the final concentration of a solution prepared by diluting 
Of 
HCl to a final volume of 
?

Accepted Answer

A)  0.504 M
B)  3.50 M
C)  0.420 M
D)  0.350 M
E)  none of the above

Question 15

Vitamin C is a water-soluble vitamin,so it is likely that this vitamin is polar.

Accepted Answer

A) True 
 B)False

Question 16

What volume (L) of 2.00 M KCl solution contains 25.0 g of KCl?

Accepted Answer

A)  0.335
B)  0.168
C)  0.672
D)  1.49
E)  none of the above

Question 17

What is the change in the freezing point of a solution made by dissolving 6H12O6 into   Of water? The density of water is   And   A) 0.152°C B) 1.01°C C) 18.97°C D) 1.82°C E) none of the above" class="answers-bank-image d-inline" rel="preload" >
Of C6H12O6 into 6H12O6 into   Of water? The density of water is   And   A) 0.152°C B) 1.01°C C) 18.97°C D) 1.82°C E) none of the above" class="answers-bank-image d-inline" rel="preload" >
Of water? The density of water is 6H12O6 into   Of water? The density of water is   And   A) 0.152°C B) 1.01°C C) 18.97°C D) 1.82°C E) none of the above" class="answers-bank-image d-inline" rel="preload" >
And 6H12O6 into   Of water? The density of water is   And   A) 0.152°C B) 1.01°C C) 18.97°C D) 1.82°C E) none of the above" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0.152°C
B)  1.01°C
C)  18.97°C
D)  1.82°C
E)  none of the above

Question 18

How many grams of KCl are needed to make 
Of 
KCl?

Accepted Answer

A)  9.13
B)  1.52
C)  91.3
D)  0.123
E)  none of the above

Question 19

Calculate the molarity of a KCl solution prepared by dissolving 0.525 moles of KCl in

Accepted Answer

A)  0.476
B)  0.00210
C)  2.10
D)  2.02
E)  none of the above

Question 20

A sugar solution is an example of a weak electrolyte solution.

Accepted Answer

A) True 
 B)False

Exam 13: Solutions

It would be expected that methanol (CH3OH)would be more soluble in water than methane (CH4)would be.

Correct AnswerverifiedShow Answer

The oxygen in the air we breath is classified as:

Correct AnswerverifiedA

How many milliliters of 0.755 M H2SO4 solution is needed to react with 55.0 mL of 2.50 M KOH solution? Given: 2 KOH (aq) + H2SO4 (aq) → 2 H2O (l) + K2SO4 (aq)

Correct AnswerverifiedShow Answer

A supersaturated solution is unstable and crystallization usually occurs.

Correct AnswerverifiedShow Answer

The solubility of Pb(NO3) 2 is 55 grams per 100 g H2O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO3) 2 is added to 100 grams of water at this temperature?

Correct AnswerverifiedShow Answer

The fact that the oceans contain salt water shows that polar solvents dissolve ionic solutes.

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions would be expected to freeze at the lowest temperature?

Correct AnswerverifiedShow Answer

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl2 solution:

Correct AnswerverifiedB

A solution contains 100.0 g water,10.0 g NaCl,and 15.0 g methanol.What is the mass percent of methanol in the solution?

Correct AnswerverifiedShow Answer

The solubility of solids in water:

Correct AnswerverifiedShow Answer

If you prepare a solution by adding sufficient amount of solute so that after heating and cooling the solution there is a visible amount of solid solute left in the bottom of the beaker,the solution would be considered ________.

Correct AnswerverifiedShow Answer

The solubility of gases in water decreases with increasing temperature.

Correct AnswerverifiedTrue

Calculate the molarity of a KCl solution made by dissolving 24.7 g of KCl in a total volume of .

Correct AnswerverifiedShow Answer

What is the final concentration of a solution prepared by diluting Of HCl to a final volume of ?

Correct AnswerverifiedShow Answer

Vitamin C is a water-soluble vitamin,so it is likely that this vitamin is polar.

Correct AnswerverifiedShow Answer

What volume (L) of 2.00 M KCl solution contains 25.0 g of KCl?

Correct AnswerverifiedShow Answer

What is the change in the freezing point of a solution made by dissolving Of C6H12O6 into Of water? The density of water is And

Correct AnswerverifiedShow Answer

How many grams of KCl are needed to make Of KCl?

Correct AnswerverifiedShow Answer

Calculate the molarity of a KCl solution prepared by dissolving 0.525 moles of KCl in

Correct AnswerverifiedShow Answer

A sugar solution is an example of a weak electrolyte solution.

Correct AnswerverifiedShow Answer

It would be expected that methanol (CH₃OH)would be more soluble in water than methane (CH₄)would be.

Correct Answer
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A

How many milliliters of 0.755 M H₂SO₄ solution is needed to react with 55.0 mL of 2.50 M KOH solution? Given: 2 KOH (aq) + H₂SO₄ (aq) → 2 H₂O (l) + K₂SO₄ (aq)

Correct Answer
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The solubility of Pb(NO₃) ₂ is 55 grams per 100 g H₂O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO₃) ₂ is added to 100 grams of water at this temperature?

Correct Answer
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In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl₂ solution:

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B

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True

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What is the change in the freezing point of a solution made by dissolving Of C₆H₁₂O₆ into Of water? The density of water is And

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