Question 1

Calculate the osmotic pressure at 298 K of a solution made by dissolving 0.10 g of CaCl2 in water and diluting to 100 mL.

Accepted Answer

A)   0.022 atm
B)   0.22 atm
C)   0.66 atm
D)   2.4 atm
E)   1.2 atmF) B) and E)
G) B) and D)

Question 2

What is the molality of a solution prepared by mixing 22 g of ethylene glycol (molar mass = 62 g/mol)  with 108 g of water?

Accepted Answer

A)   0.17 m
B)   0.20 m
C)   3.3 m
D)   12. m
E)   none of theseF) A) and E)
G) A) and D)

Question 3

Arrange the following solutions in order of increasing boiling point. 0.15 M Li3PO4 0.25 M MgSO4 0.55 M glucose (C6H12O6)

Accepted Answer

A)   (lowest bp)  0.15 M Li3PO4 4 
B)   (lowest bp)  0.55 M glucose 4 3PO4 (highest bp) 
C)   (lowest bp)  0.15 M Li3PO4 4 (highest bp) 
D)   (lowest bp)  0.25 M MgSO4 3PO4 
E)   (lowest bp)  0.25 M MgSO4 3PO4 (highest bp) F) C) and D)
G) B) and C)

Question 4

What is the definition for molarity ?

Accepted Answer

A)   Grams of solute per moles of solute
B)   Moles of solute per grams of solution
C)   Moles of solute per Liter of solvent
D)   Grams of solute per Liter of solution
E)   Moles of solute per Liter of solutionF) A) and B)
G) A) and E)

Question 5

A solution that contains 2.00 g of ferrocene [molar mass = 186.0 g/mol] dissolved in 50.0 g of ethylene bromide (C2H4Br2)  has a freezing point of 7.26 ° C. The normal freezing point of ethylene bromide is 9.80 ° C. What is the freezing point depression constant for this solvent?

Accepted Answer

A)   11.8 ° C/m
B)   1.86 ° C/m
C)   4.90 ° C/m
D)   63.5 ° C/m
E)   none of theseF) A) and D)
G) A) and E)

Question 6

How many grams of NaCl must be dissolved in 500 g of H2O to prepare a 0.750 m solution?
Molar Mass(NaCl)  = 58.44 g/mol

Accepted Answer

A)   6.42×10 - 3 g NaCl
B)   0.156 g NaCl
C)   21.9 g NaCl
D)   39.0 g NaCl
E)   87.7 g NaClF) A) and B)
G) B) and D)

Question 7

Which substance listed below would be most likely to dissolve in H2O?

Accepted Answer

A)   BaCl2
B)   I2
C)   C2H6
D)   CH2Cl2
E)   none would dissolveF) D) and E)
G) A) and B)

Question 8

A solution is prepared by mixing 22 g ethylene glycol [C2H4(OH) 2] with 108 g of water. What is the mass percent of ethylene glycol in the solution?

Accepted Answer

A)   20%
B)   17%
C)   22%
D)   83%
E)   none of theseF) A) and E)
G) A) and B)

Question 9

How many grams of H2SO4 are present in 75.0 mL of 12.0 M H2SO4?
MM (H2SO4)  = 98.09 g/mol

Accepted Answer

A)   1.63 g H2SO4
B)   9.18 g H2SO4
C)   15.7 g H2SO4
D)   88.3 g H2SO4
E)   613 g H2SO4F) D) and E)
G) B) and E)

Question 10

A 3.38 molar solution of cesium chloride (molar mass = 168.4 g/mol)  has a density of 1.423 g/mL. What is the molality of the solution?

Accepted Answer

A)   4.81 m
B)   3.96 m
C)   3.38 m
D)   2.38 m
E)   none of theseF) D) and E)
G) A) and D)

Question 11

How many grams of solute are present in 164.1 mL of 0.207 M calcium acetate, Ca(C2H3O2) 2?
MM[Ca(C2H3O2) 2] = 158.17 g/mol

Accepted Answer

A)   0.200 g Ca(C2H3O2) 2
B)   0.215 g Ca(C2H3O2) 2
C)   4.66 g Ca(C2H3O2) 2
D)   5.01 g Ca(C2H3O2) 2
E)   5.37 g Ca(C2H3O2) 2F) A) and E)
G) A) and B)

Question 12

Glacial acetic acid, HC2H3O2, is 99.8% (m/m) . What is this solution's Molar concentration if its density is 1.049 g/mL?
MM(HC2H3O2)  = 60.05 g/mol

Accepted Answer

A)   1.05 M
B)   6.31 M
C)   15.8 M
D)   16.6 M
E)   17.4 MF) B) and D)
G) A) and B)

Question 13

What is the van't Hoff factor for an aqueous solution of Potassium carbonate?

Accepted Answer

A)   i = 1
B)   i = 2
C)   i = 3
D)   i = 4
E)   i = 6F) A) and B)
G) All of the above

Question 14

What is the mass percent , %(m/m) , of an aqueous solution prepared by dissolving 12.5 g of KNO3 in 125 g of water?

Accepted Answer

A)   0.0909%
B)   0.100%
C)   9.09%
D)   10.0%
E)   90.9%F) C) and D)
G) A) and B)

Question 15

A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.18 grams of the compound in water to form 0.250 L of solution. The resulting solution has an osmotic pressure of 0.638 atm at 25 ° C. What is the molar mass of this organic compound?

Accepted Answer

A)   20.9 g/mol
B)   28.0 g/mol
C)   136 g/mol
D)   334 g/mol
E)   1.26×103 g/molF) A) and B)
G) A) and C)

Question 16

How many grams of glucose must be added to 275 g of water in order to prepare a 31.0% aqueous glucose solution?

Accepted Answer

A)   7.78 g glucose
B)   85.3 g glucose
C)   124 g glucose
D)   612 g glucose
E)   887 g glucoseF) D) and E)
G) A) and E)

Question 17

The presence of a nonvolatile solute in water will:

Accepted Answer

A)   lower the freezing point, vapor pressure, and boiling point.
B)   raise the freezing point, vapor pressure, and boiling point.
C)   lower the freezing point and vapor pressure and raise the boiling point.
D)   raise the freezing point and lower the vapor pressure and boiling point.
E)   have no effect.F) A) and C)
G) D) and E)

Question 18

Which of the substances listed below is more soluble in hexane (C6H14)  than in water?

Accepted Answer

A)   KI
B)   C2H5OH
C)   C10H21Cl
D)   CH3NH2
E)   none of theseF) A) and C)
G) B) and E)

Question 19

What is the molarity of ions in an aqueous 0.4 M Al(NO3) 3 solution?

Accepted Answer

A)   0.1 M
B)   0.4 M
C)   0.8 M
D)   1.6 M
E)   5.2 MF) A) and B)
G) A) and C)

Question 20

How many moles of sucrose, C12H22O11, is present in 80.0 grams of an aqueous solution that is 3.50% sucrose by mass?
MM(C12H22O11)  = 342.30 g/mol

Accepted Answer

A)   8.18×10 - 3 moles
B)   0.150 moles
C)   2.80 moles
D)   122 moles
E)   958 molesF) B) and C)
G) B) and D)

Exam 12: Solutions

A solution that contains 2.00 g of ferrocene [molar mass = 186.0 g/mol] dissolved in 50.0 g of ethylene bromide (C2H4Br2) has a freezing point of 7.26 ° C. The normal freezing point of ethylene bromide is 9.80 ° C. What is the freezing point depression constant for this solvent?

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What is the mass percent , %(m/m) , of an aqueous solution prepared by dissolving 12.5 g of KNO3 in 125 g of water?

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What is the molality of a solution prepared by mixing 22 g of ethylene glycol (molar mass = 62 g/mol) with 108 g of water?

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Arrange the following solutions in order of increasing boiling point. 0.15 M Li3PO4 0.25 M MgSO4 0.55 M glucose (C6H12O6)

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How many grams of solute are present in 164.1 mL of 0.207 M calcium acetate, Ca(C2H3O2) 2? MM[Ca(C2H3O2) 2] = 158.17 g/mol

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The presence of a nonvolatile solute in water will:

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How many grams of glucose must be added to 275 g of water in order to prepare a 31.0% aqueous glucose solution?

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A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.18 grams of the compound in water to form 0.250 L of solution. The resulting solution has an osmotic pressure of 0.638 atm at 25 ° C. What is the molar mass of this organic compound?

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What is the molarity of ions in an aqueous 0.4 M Al(NO3) 3 solution?

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How many grams of NaCl must be dissolved in 500 g of H2O to prepare a 0.750 m solution? Molar Mass(NaCl) = 58.44 g/mol

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A solution is prepared by mixing 22 g ethylene glycol [C2H4(OH) 2] with 108 g of water. What is the mass percent of ethylene glycol in the solution?

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Which of the substances listed below is more soluble in hexane (C6H14) than in water?

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A 3.38 molar solution of cesium chloride (molar mass = 168.4 g/mol) has a density of 1.423 g/mL. What is the molality of the solution?

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How many moles of sucrose, C12H22O11, is present in 80.0 grams of an aqueous solution that is 3.50% sucrose by mass? MM(C12H22O11) = 342.30 g/mol

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What is the van't Hoff factor for an aqueous solution of Potassium carbonate?

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Glacial acetic acid, HC2H3O2, is 99.8% (m/m) . What is this solution's Molar concentration if its density is 1.049 g/mL? MM(HC2H3O2) = 60.05 g/mol

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Calculate the osmotic pressure at 298 K of a solution made by dissolving 0.10 g of CaCl2 in water and diluting to 100 mL.

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Which substance listed below would be most likely to dissolve in H2O?

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How many grams of H2SO4 are present in 75.0 mL of 12.0 M H2SO4? MM (H2SO4) = 98.09 g/mol

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What is the definition for molarity ?

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A solution that contains 2.00 g of ferrocene [molar mass = 186.0 g/mol] dissolved in 50.0 g of ethylene bromide (C₂H₄Br₂) has a freezing point of 7.26 ° C. The normal freezing point of ethylene bromide is 9.80 ° C. What is the freezing point depression constant for this solvent?

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What is the mass percent , %(m/m) , of an aqueous solution prepared by dissolving 12.5 g of KNO₃ in 125 g of water?

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Correct Answer
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Arrange the following solutions in order of increasing boiling point. 0.15 M Li₃PO₄ 0.25 M MgSO₄ 0.55 M glucose (C₆H₁₂O₆)

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How many grams of solute are present in 164.1 mL of 0.207 M calcium acetate, Ca(C₂H₃O₂) ₂? MM[Ca(C₂H₃O₂) ₂] = 158.17 g/mol

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Correct Answer
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Correct Answer
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Correct Answer
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What is the molarity of ions in an aqueous 0.4 M Al(NO₃) ₃ solution?

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How many grams of NaCl must be dissolved in 500 g of H₂O to prepare a 0.750 m solution? Molar Mass(NaCl) = 58.44 g/mol

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A solution is prepared by mixing 22 g ethylene glycol [C₂H₄(OH) ₂] with 108 g of water. What is the mass percent of ethylene glycol in the solution?

Correct Answer
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Which of the substances listed below is more soluble in hexane (C₆H₁₄) than in water?

Correct Answer
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Correct Answer
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How many moles of sucrose, C₁₂H₂₂O₁₁, is present in 80.0 grams of an aqueous solution that is 3.50% sucrose by mass? MM(C₁₂H₂₂O₁₁) = 342.30 g/mol

Correct Answer
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Correct Answer
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Glacial acetic acid, HC₂H₃O₂, is 99.8% (m/m) . What is this solution's Molar concentration if its density is 1.049 g/mL? MM(HC₂H₃O₂) = 60.05 g/mol

Correct Answer
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Calculate the osmotic pressure at 298 K of a solution made by dissolving 0.10 g of CaCl₂ in water and diluting to 100 mL.

Correct Answer
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Which substance listed below would be most likely to dissolve in H₂O?

Correct Answer
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How many grams of H₂SO₄ are present in 75.0 mL of 12.0 M H₂SO₄? MM (H₂SO₄) = 98.09 g/mol

Correct Answer
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Correct Answer
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