Question 1

How does a solution of two volatile components with strong solute-solvent attractions deviate from Raoult's law? Why?

Accepted Answer

The vapour pressure of the solution will...

Question 2

What mass of ethane (CH3CH3) is contained in 50.0 mL of a 13.9% by mass solution of ethane in hexane? The density of the solution is 0.611 g mL-1.

Accepted Answer

A)  2.35 g
B)  8.49 g
C)  11.8 g
D)  6.95 g
E)  4.25 gF) A) and D)
G) C) and D)

Question 3

Calculate the vapour pressure of pure water at 85 °C if a 285 mL solution containing 173.0 g of mannose, C6H12O6, has a vapour pressure of 545.0 mbar.

Accepted Answer

A)  531 mbar
B)  578 mbar
C)  508 mbar
D)  599 mbar
E)  520 mbarF) B) and D)
G) A) and E)

Question 4

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

Accepted Answer

A)  4.09 × 10-3
B)  7.80 × 10-2
C)  1.28 × 10-3
D)  7.23 × 10-2
E)  2.45 × 10-3F) A) and D)
G) A) and C)

Question 5

Calculate the solution temperature required to produce an osmotic pressure of 1.18 mbar using 3.72 mg of a protein with a molar mass of 4176 g mol-1 that is dissolved in enough water to create 20.9 mL of solution.

Accepted Answer

A)  333 K
B)  298 K
C)  316 K
D)  351 K
E)  288 KF) A) and D)
G) All of the above

Question 6

How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?

Accepted Answer

A)  54.0 g
B)  74.2 g
C)  87.5 g
D)  114 gE) None of the above
F) C) and D)

Question 7

A solution containing less than the equilibrium amount is called

Accepted Answer

A)  an unsaturated solution.
B)  a dilute solution.
C)  a supersaturated solution.
D)  a concentrated solution.
E)  a saturated solution.F) C) and D)
G) None of the above

Question 8

Which of the following statements is TRUE?

Accepted Answer

A)  In general, the solubility of a solid in water decreases with increasing temperature.
B)  In general, the solubility of a gas in water decreases with increasing temperature.
C)  The solubility of a gas in water usually increases with decreasing pressure.
D)  The solubility of an ionic solid in water decreases with increasing temperature.
E)  None of the above statements is true.F) A) and B)
G) A) and E)

Question 9

A 1.00 L sample of water contains 0.0036 g of Cl⁻ ions. Determine the concentration of chloride ions in ppm if the density of the solution is 1.00 g mL-1.

Accepted Answer

A)  2.8 ppm
B)  7.2 ppm
C)  3.6 ppm
D)  1.8 ppm
E)  5.4 ppmF) None of the above
G) B) and C)

Question 10

Match the following.

-0.050 mol kg-1 NaCl

Accepted Answer

A)  largest van't Hoff factor
B)  solution that is most strongly dependent upon pressure
C)  solution of ionic compound with highest freezing point.
D)  highest boiling point
E)  solution with ΔTb = 0.026 °CF) A) and E)
G) C) and D)

Question 11

Define the Tyndall effect.

Accepted Answer

The Tyndall effect i...

Question 12

Which of the following compounds will be most soluble in ethanol (CH3CH2OH) ?

Accepted Answer

A)  trimethylamine (N(CH3) 3) 
B)  acetone (CH3COCH3) 
C)  ethylene glycol (HOCH2CH2OH) 
D)  hexane (CH3CH2CH2CH2CH2CH3) 
E)  None of these compounds should be soluble in ethanol.F) A) and C)
G) B) and C)

Question 13

A solution is prepared by adding 1.43 mol of KCl to 889 g of water. The concentration of KCl is ________ molal.

Accepted Answer

A)  1.61 × 10-3
B)  622
C)  0.622
D)  1.27 × 103
E)  1.61F) A) and E)
G) D) and E)

Question 14

What is the term for the amount of solute in moles per litre of solution?

Accepted Answer

A)  molality
B)  molarity
C)  mole fraction
D)  mole percent
E)  mass percentF) D) and E)
G) A) and E)

Question 15

Which cation in each set is expected to have the larger (more negative) hydration energy? I Be2+ or Ca2+
II Rb+ or Zn2+

Accepted Answer

A)  Be2+ in set I and Rb+ in set II
B)  Be2+ in set I and Zn2+ in set II
C)  Ca2+ in set I and Rb+ in set II
D)  Ca2+ in set I and Zn2+ in set IIE) C) and D)
F) None of the above

Question 16

Calculate the volume of solution that has a vapour pressure of 31.27 mbar and contains 84.3 g of sucrose, C12H22O11, at a temperature of 25.0 °C. The vapour pressure of pure water at 25 °C is 31.7 mbar, the density of water is 1.00 g mL-1, and assume no change in volume occurs upon dissolution.

Accepted Answer

A)  204 mL
B)  31.8 mL
C)  286 mL
D)  323 mL
E)  516 mLF) A) and E)
G) C) and E)

Question 17

An aqueous solution has a normal boiling point of 103.0 °C. What is the freezing point of this solution? For water Kb = 0.51 °C m-1 and Kf = 1.86 °C m-1.

Accepted Answer

A)  -0.82 °C
B)  -3.0 °C
C)  -3.6 °C
D)  -11 °CE) All of the above
F) A) and B)

Question 18

Calculate the total solution volume required to produce an osmotic pressure of 6.39 mbar using 12.34 mg of a protein with a molar mass of 5309 g mol-1 at 25.0 °C.

Accepted Answer

A)  12.5 mL
B)  11.8 mL
C)  9.91 mL
D)  8.37 mL
E)  9.02 mLF) C) and D)
G) All of the above

Question 19

How many moles of KF are contained in 347 g of water in a 0.175 mol kg-1 KF solution?

Accepted Answer

A)  1.65 × 10-2 mol KF
B)  5.04 × 10-2 mol KF
C)  6.07 × 10-2 mol KF
D)  3.22 × 10-2 mol KF
E)  1.98 × 10-2 mol KFF) B) and C)
G) C) and D)

Exam 12: Solutions

An aqueous solution has a normal boiling point of 103.0 °C. What is the freezing point of this solution? For water K_b = 0.51 °C m^-1and K_f = 1.86 °C m^-1.

Correct Answer
verified

A solution containing less than the equilibrium amount is called

Correct Answer
verified

How many moles of KF are contained in 347 g of water in a 0.175 mol kg^-1 KF solution?

Correct Answer
verified

A solution is prepared by adding 1.43 mol of KCl to 889 g of water. The concentration of KCl is ________ molal.

Correct Answer
verified

Calculate the vapour pressure of pure water at 85 °C if a 285 mL solution containing 173.0 g of mannose, C₆H₁₂O₆, has a vapour pressure of 545.0 mbar.

Correct Answer
verified

Which of the following statements is TRUE?

Correct Answer
verified

What is the term for the amount of solute in moles per litre of solution?

Correct Answer
verified

Which cation in each set is expected to have the larger (more negative) hydration energy? I Be²⁺ or Ca²⁺ II Rb⁺ or Zn²⁺

Correct Answer
verified

A 1.00 L sample of water contains 0.0036 g of Cl⁻ ions. Determine the concentration of chloride ions in ppm if the density of the solution is 1.00 g mL^-1.

Correct Answer
verified

Which of the following compounds will be most soluble in ethanol (CH₃CH₂OH) ?

Correct Answer
verified

Define the Tyndall effect.

Correct Answer
verified
The Tyndall effect i...
View Answer

How much water must be added to 40.0 g of CaCl₂ to produce a solution that is 35.0 wt% CaCl₂?

Correct Answer
verified

Correct Answer
verified

Calculate the total solution volume required to produce an osmotic pressure of 6.39 mbar using 12.34 mg of a protein with a molar mass of 5309 g mol^-1 at 25.0 °C.

Correct Answer
verified

What mass of ethane (CH₃CH₃) is contained in 50.0 mL of a 13.9% by mass solution of ethane in hexane? The density of the solution is 0.611 g mL^-1.

Correct Answer
verified

How does a solution of two volatile components with strong solute-solvent attractions deviate from Raoult's law? Why?

Correct Answer
verified
The vapour pressure of the solution will...
View Answer

Match the following. -0.050 mol kg^-1 NaCl

Correct Answer
verified

A solution is prepared by dissolving 38.6 g sucrose (C₁₂H₂₂O₁₁) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

Correct Answer
verified

Calculate the solution temperature required to produce an osmotic pressure of 1.18 mbar using 3.72 mg of a protein with a molar mass of 4176 g mol^-1 that is dissolved in enough water to create 20.9 mL of solution.

Correct Answer
verified

Exam 12: Solutions

An aqueous solution has a normal boiling point of 103.0 °C. What is the freezing point of this solution? For water Kb = 0.51 °C m-1 and Kf = 1.86 °C m-1.

Correct AnswerverifiedShow Answer

A solution containing less than the equilibrium amount is called

Correct AnswerverifiedShow Answer

How many moles of KF are contained in 347 g of water in a 0.175 mol kg-1 KF solution?

Correct AnswerverifiedShow Answer

A solution is prepared by adding 1.43 mol of KCl to 889 g of water. The concentration of KCl is ________ molal.

Correct AnswerverifiedShow Answer

Calculate the vapour pressure of pure water at 85 °C if a 285 mL solution containing 173.0 g of mannose, C6H12O6, has a vapour pressure of 545.0 mbar.

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

What is the term for the amount of solute in moles per litre of solution?

Correct AnswerverifiedShow Answer

Which cation in each set is expected to have the larger (more negative) hydration energy? I Be2+ or Ca2+ II Rb+ or Zn2+

Correct AnswerverifiedShow Answer

A 1.00 L sample of water contains 0.0036 g of Cl⁻ ions. Determine the concentration of chloride ions in ppm if the density of the solution is 1.00 g mL-1.

Correct AnswerverifiedShow Answer

Which of the following compounds will be most soluble in ethanol (CH3CH2OH) ?

Correct AnswerverifiedShow Answer

Define the Tyndall effect.

Correct AnswerverifiedThe Tyndall effect i...View AnswerShow Answer

How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?

Correct AnswerverifiedShow Answer

Calculate the volume of solution that has a vapour pressure of 31.27 mbar and contains 84.3 g of sucrose, C12H22O11, at a temperature of 25.0 °C. The vapour pressure of pure water at 25 °C is 31.7 mbar, the density of water is 1.00 g mL-1, and assume no change in volume occurs upon dissolution.

Correct AnswerverifiedShow Answer

Calculate the total solution volume required to produce an osmotic pressure of 6.39 mbar using 12.34 mg of a protein with a molar mass of 5309 g mol-1 at 25.0 °C.

Correct AnswerverifiedShow Answer

What mass of ethane (CH3CH3) is contained in 50.0 mL of a 13.9% by mass solution of ethane in hexane? The density of the solution is 0.611 g mL-1.

Correct AnswerverifiedShow Answer

How does a solution of two volatile components with strong solute-solvent attractions deviate from Raoult's law? Why?

Correct AnswerverifiedThe vapour pressure of the solution will...View AnswerShow Answer

Match the following. -0.050 mol kg-1 NaCl

Correct AnswerverifiedShow Answer

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

Correct AnswerverifiedShow Answer

Calculate the solution temperature required to produce an osmotic pressure of 1.18 mbar using 3.72 mg of a protein with a molar mass of 4176 g mol-1 that is dissolved in enough water to create 20.9 mL of solution.

Correct AnswerverifiedShow Answer

An aqueous solution has a normal boiling point of 103.0 °C. What is the freezing point of this solution? For water K_b = 0.51 °C m^-1and K_f = 1.86 °C m^-1.

Correct Answer
verified

Correct Answer
verified

How many moles of KF are contained in 347 g of water in a 0.175 mol kg^-1 KF solution?

Correct Answer
verified

Correct Answer
verified

Calculate the vapour pressure of pure water at 85 °C if a 285 mL solution containing 173.0 g of mannose, C₆H₁₂O₆, has a vapour pressure of 545.0 mbar.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which cation in each set is expected to have the larger (more negative) hydration energy? I Be²⁺ or Ca²⁺ II Rb⁺ or Zn²⁺

Correct Answer
verified

A 1.00 L sample of water contains 0.0036 g of Cl⁻ ions. Determine the concentration of chloride ions in ppm if the density of the solution is 1.00 g mL^-1.

Correct Answer
verified

Which of the following compounds will be most soluble in ethanol (CH₃CH₂OH) ?

Correct Answer
verified

Correct Answer
verified
The Tyndall effect i...
View Answer

How much water must be added to 40.0 g of CaCl₂ to produce a solution that is 35.0 wt% CaCl₂?

Correct Answer
verified

Correct Answer
verified

Calculate the total solution volume required to produce an osmotic pressure of 6.39 mbar using 12.34 mg of a protein with a molar mass of 5309 g mol^-1 at 25.0 °C.

Correct Answer
verified

What mass of ethane (CH₃CH₃) is contained in 50.0 mL of a 13.9% by mass solution of ethane in hexane? The density of the solution is 0.611 g mL^-1.

Correct Answer
verified

Correct Answer
verified
The vapour pressure of the solution will...
View Answer

Match the following. -0.050 mol kg^-1 NaCl

Correct Answer
verified

A solution is prepared by dissolving 38.6 g sucrose (C₁₂H₂₂O₁₁) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

Correct Answer
verified

Calculate the solution temperature required to produce an osmotic pressure of 1.18 mbar using 3.72 mg of a protein with a molar mass of 4176 g mol^-1 that is dissolved in enough water to create 20.9 mL of solution.

Correct Answer
verified