What is the expected freezing point of a 0.50 m solution of Li2SO4 in water? Kf for water is 1.86°C/m.

A) -0.93°C B) -1.9°C C) -2.8°C D) -6.5°C A) -0.93°C B) -1.9°C C) -2.8°C D) -6.5°C

What molality of pentane is obtained by dissolving 5.0 g pentane,C5H12,in 245.0 g hexane,C6H14?

A) 0)020 m B) 0)024 m C) 0)28 m D) 20.m A) 0)020 m B) 0)024 m C) 0)28 m D) 20.m

Arrows in the energy diagram below represent enthalpy changes occurring in the endothermic formation of a solution: ΔHS1U1B1solnS1U1B0 = enthalpy of solution ΔHS1U1B1solute-soluteS1U1B0 = enthalpy change involving solute-solute interactions ΔHS1U1B1solute-solventS1U1B0 = enthalpy change involving solute-solvent interactions ΔHS1U1B1solvent-solventS1U1B0 = enthalpy change involving solvent-solvent interactions -Which arrows represent ΔHsolute-solute and ΔHsolvent-solvent?

A) arrow (a)and arrow (b) B) arrow (a)and arrow (c) C) arrow (a)and arrow (d) D) arrow (c)and arrow (d) A) arrow (a)and arrow (b) B) arrow (a)and arrow (c) C) arrow (a)and arrow (d) D) arrow (c)and arrow (d)

Exam 11: Solutions and Their Properties

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,at what approximate temperature will the mixture begin to boil?

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Question 1

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Which of the following mixtures have components which can be separated by filtration?

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Question 2

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Which of the following should most favor the solubility of an ionic solid in water?

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Question 3

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Verified

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 1500 m Hg?

(Short Answer)

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Question 4

What is the expected freezing point of a 0.50 m solution of Li₂SO₄ in water? K_f for water is 1.86°C/m.

(Multiple Choice)

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Question 5

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

(Multiple Choice)

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Question 6

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: Ce₂(SO₄)₃,K₂SO₄,KBr,NaCl.

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Question 7

What volume of 0.716 M KBr solution is needed to provide 10.5 g of KBr?

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Question 8

Which of the following statements is true for a supersaturated solution?

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Question 9

The dose of amoxicillin given to a young child is 40 mg/kg of body weight/day.If the amoxicillin is administered as a suspension having a concentration of 400 mg/5 mL,how many mL of amoxicillin must be administered per dose for a child weighing 18 pounds?

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Question 10

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

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Question 11

KBr does not dissolve well in nonpolar solvents because

(Multiple Choice)

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Question 12

-What is the approximate boiling temperature of the liquid formed from the condensation of the vapor above a boiling solution that is 0.70 X_A and 0.30 X_B?

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Question 13

A solution of 0.2113 g of water dissolved in 25.0 g of a solvent freezes at 11.5°C below the freezing point of the solvent.What is K_f for this solvent?

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Question 14

Which ion-dipole interaction results in the larger (more negative)hydration energy?

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Question 15

What molality of pentane is obtained by dissolving 5.0 g pentane,C₅H₁₂,in 245.0 g hexane,C₆H₁₄?

(Multiple Choice)

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Question 16

The vapor pressure of water at 25°C is 23.8 mm Hg.The vapor pressure lowering,ΔP,of an aqueous solution containing 0.500 mole fraction NaCl is ________ (equal to,greater than,less than)11.9 mm Hg?

(Short Answer)

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Question 17

Arrows in the energy diagram below represent enthalpy changes occurring in the endothermic formation of a solution: ΔH_soln = enthalpy of solution ΔH_{solute-solute} = enthalpy change involving solute-solute interactions ΔH_{solute-solvent} = enthalpy change involving solute-solvent interactions ΔH_{solvent-solvent} = enthalpy change involving solvent-solvent interactions -Which arrows represent ΔH_{solute-solute} and ΔH_{solvent-solvent}?

(Multiple Choice)

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Question 18

To make a 2.00 m solution,one could take 2.00 moles of solute and add

(Multiple Choice)

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Question 19

Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution.The density of the solution is 1.53 g/mL.Calculate the molarity of this sodium hydroxide solution.

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Question 20

Showing 1 - 20 of 192

Exam 11: Solutions and Their Properties

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,at what approximate temperature will the mixture begin to boil?

Which of the following mixtures have components which can be separated by filtration?

Which of the following should most favor the solubility of an ionic solid in water?

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 1500 m Hg?

What is the expected freezing point of a 0.50 m solution of Li2SO4 in water? Kf for water is 1.86°C/m.

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

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: Ce2(SO4)3,K2SO4,KBr,NaCl.

What volume of 0.716 M KBr solution is needed to provide 10.5 g of KBr?

Which of the following statements is true for a supersaturated solution?

The dose of amoxicillin given to a young child is 40 mg/kg of body weight/day.If the amoxicillin is administered as a suspension having a concentration of 400 mg/5 mL,how many mL of amoxicillin must be administered per dose for a child weighing 18 pounds?

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

KBr does not dissolve well in nonpolar solvents because

-What is the approximate boiling temperature of the liquid formed from the condensation of the vapor above a boiling solution that is 0.70 XA and 0.30 XB?

A solution of 0.2113 g of water dissolved in 25.0 g of a solvent freezes at 11.5°C below the freezing point of the solvent.What is Kf for this solvent?

Which ion-dipole interaction results in the larger (more negative)hydration energy?

What molality of pentane is obtained by dissolving 5.0 g pentane,C5H12,in 245.0 g hexane,C6H14?

The vapor pressure of water at 25°C is 23.8 mm Hg.The vapor pressure lowering,ΔP,of an aqueous solution containing 0.500 mole fraction NaCl is ________ (equal to,greater than,less than)11.9 mm Hg?

To make a 2.00 m solution,one could take 2.00 moles of solute and add

Sodium hydroxide is available commercially as a 50.0% by weight aqueous solution.The density of the solution is 1.53 g/mL.Calculate the molarity of this sodium hydroxide solution.

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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 1500 m Hg?

What is the expected freezing point of a 0.50 m solution of Li₂SO₄ in water? K_f for water is 1.86°C/m.

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: Ce₂(SO₄)₃,K₂SO₄,KBr,NaCl.

-What is the approximate boiling temperature of the liquid formed from the condensation of the vapor above a boiling solution that is 0.70 X_A and 0.30 X_B?

A solution of 0.2113 g of water dissolved in 25.0 g of a solvent freezes at 11.5°C below the freezing point of the solvent.What is K_f for this solvent?

What molality of pentane is obtained by dissolving 5.0 g pentane,C₅H₁₂,in 245.0 g hexane,C₆H₁₄?