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

A) 54.0 g B) 74.2 g C) 87.5 g D) 114 g A) 54.0 g B) 74.2 g C) 87.5 g D) 114 g

When ethylene glycol,HOCH2CH2OH,is added to the water in an automobile radiator,the effect is to

A) lower the boiling point and lower the freezing point. B) lower the boiling point and raise the freezing point. C) raise the boiling point and lower the freezing point. D) raise the boiling point and raise the freezing point. A) lower the boiling point and lower the freezing point. B) lower the boiling point and raise the freezing point. C) raise the boiling point and lower the freezing point. D) raise the boiling point and raise the freezing point.

What is the freezing point of a solution of 7.15 g MgCl2 in 100 g of water? Kf for water is

A) -0.140°C B) - 1.40°C C) - 2.80°C D) - 4.18°C A) -0.140°C B) - 1.40°C C) - 2.80°C D) - 4.18°C

What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane,C6H14?

A) 0)0715 B) 0)0770 C) 0)133 D) 0)154 A) 0)0715 B) 0)0770 C) 0)133 D) 0)154

Exam 11: 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?

(Multiple Choice)

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Question 41

-What is the approximate boiling temperature of a mixture that is 0.70 X_A and 0.30 X_B?

(Multiple Choice)

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Question 42

A solution of LiCl in water has X_LiCl = 0.0 900.What is the molality?

(Multiple Choice)

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Question 43

A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = 69°C)and decane (bp = 126°C)is shown. -Assume that you start with a mixture containing 0.80 mol of decane and 0.20 mol of octane,what region of the diagram corresponds to liquid?

(Multiple Choice)

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Question 44

Which of the following solutions will have the lowest freezing point?

(Multiple Choice)

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Question 45

What volume of a 0.716 M KBr solution is needed to provide 30.5 g of KBr?

(Multiple Choice)

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Question 46

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

(Multiple Choice)

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Question 47

The Henry's Law constant of methyl bromide,CH₃Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 270.mm Hg?

(Multiple Choice)

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Question 48

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

(Multiple Choice)

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Question 49

Two beakers,one with pure water (light gray)and the other with an aqueous solution of KBr (dark gray),are placed in a closed container represented by drawing (a).Which of the drawings (a)-(d)represents what the beakers will look like after a substantial amount of time has passed?

(Multiple Choice)

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Question 50

Concentrations of fluoride in drinking water greater than 4.0 mg/L can cause mottled teeth in children.What is 4.0 mg/L expressed as molality?

(Short Answer)

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Question 51

When ethylene glycol,HOCH₂CH₂OH,is added to the water in an automobile radiator,the effect is to

(Multiple Choice)

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Question 52

When two similar liquids mix to form a solution,the entropy of solution (ΔS_soln)is expected to be

(Multiple Choice)

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Question 53

What is the freezing point of a solution of 7.15 g MgCl₂ in 100 g of water? K_f for water is

(Multiple Choice)

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Question 54

A 1.0 m aqueous CaCl₂ solution will have a vapor pressure, freezing point,and boiling point than a 1.0 m aqueous solution of NaCl.

(Short Answer)

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Question 55

Freezing point depression,boiling point elevation,vapor pressure lowering,and osmotic pressure are examples of ________ properties,which depend on the amount but not the chemical identity of dissolved particles.

(Short Answer)

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Question 56

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane,C₆H₁₄?

(Multiple Choice)

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Question 57

Which cation in each set would be expected to have the larger (more negative)hydration energy? I.Fe²⁺ or Fe³⁺ II.Li⁺ or NH₄⁺

(Multiple Choice)

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Question 58

Stainless steel is an example of a ________ solution.

(Multiple Choice)

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Question 59

Drawing (1)shows a system in which an equilibrium exists between dissolved and undissolved gas particles at P = 1 atm.According to Henry's law,if the pressure is increased to 2 atm and equilibrium is restored,which drawing (2)-(5)best represents the equilibrium at 2 atm?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 192

Exam 11: 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?

-What is the approximate boiling temperature of a mixture that is 0.70 XA and 0.30 XB?

A solution of LiCl in water has XLiCl = 0.0 900.What is the molality?

A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = 69°C)and decane (bp = 126°C)is shown. -Assume that you start with a mixture containing 0.80 mol of decane and 0.20 mol of octane,what region of the diagram corresponds to liquid?

Which of the following solutions will have the lowest freezing point?

What volume of a 0.716 M KBr solution is needed to provide 30.5 g of KBr?

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

The Henry's Law constant of methyl bromide,CH3Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 270.mm Hg?

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

Two beakers,one with pure water (light gray)and the other with an aqueous solution of KBr (dark gray),are placed in a closed container represented by drawing (a).Which of the drawings (a)-(d)represents what the beakers will look like after a substantial amount of time has passed?

Concentrations of fluoride in drinking water greater than 4.0 mg/L can cause mottled teeth in children.What is 4.0 mg/L expressed as molality?

When ethylene glycol,HOCH2CH2OH,is added to the water in an automobile radiator,the effect is to

When two similar liquids mix to form a solution,the entropy of solution (ΔSsoln)is expected to be

What is the freezing point of a solution of 7.15 g MgCl2 in 100 g of water? Kf for water is

A 1.0 m aqueous CaCl2 solution will have a ________ vapor pressure,________ freezing point,and ________ boiling point than a 1.0 m aqueous solution of NaCl.

Freezing point depression,boiling point elevation,vapor pressure lowering,and osmotic pressure are examples of ________ properties,which depend on the amount but not the chemical identity of dissolved particles.

What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane,C6H14?

Which cation in each set would be expected to have the larger (more negative)hydration energy? I.Fe2+ or Fe3+ II.Li+ or NH4+

Stainless steel is an example of a ________ solution.

Drawing (1)shows a system in which an equilibrium exists between dissolved and undissolved gas particles at P = 1 atm.According to Henry's law,if the pressure is increased to 2 atm and equilibrium is restored,which drawing (2)-(5)best represents the equilibrium at 2 atm?

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-What is the approximate boiling temperature of a mixture that is 0.70 X_A and 0.30 X_B?

A solution of LiCl in water has X_LiCl = 0.0 900.What is the molality?

The Henry's Law constant of methyl bromide,CH₃Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 270.mm Hg?

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

When ethylene glycol,HOCH₂CH₂OH,is added to the water in an automobile radiator,the effect is to

When two similar liquids mix to form a solution,the entropy of solution (ΔS_soln)is expected to be

What is the freezing point of a solution of 7.15 g MgCl₂ in 100 g of water? K_f for water is

A 1.0 m aqueous CaCl₂ solution will have a vapor pressure, freezing point,and boiling point than a 1.0 m aqueous solution of NaCl.

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane,C₆H₁₄?

Which cation in each set would be expected to have the larger (more negative)hydration energy? I.Fe²⁺ or Fe³⁺ II.Li⁺ or NH₄⁺