Determine the freezing point depression of a solution that contains 30.7 g glycerin (C3H8O3,molar mass = 92.09 g/mol)in 376 mL of water.Some possibly useful constants for water are Kf = 1.86°C/m and Kb = 0.512°C/m.

A) 0.887°C B) 1.65°C C) 3.33°C D) 4.98°C E) 0.654°C A) 0.887°C B) 1.65°C C) 3.33°C D) 4.98°C E) 0.654°C

Calculate the mole fraction of CaBr2 in an aqueous solution prepared by dissolving 0.400 moles of CaBr2 in 850.0 g of water.

A) 0.00841 B) 0.0540 C) 0.00900 D) 0.0252 E) 0.0167 A) 0.00841 B) 0.0540 C) 0.00900 D) 0.0252 E) 0.0167

Match between columns Premises: 0.050 m NaCl 0.050 m CS1U1B16S1U1B0HS1U1B112S1U1B0OS1U1B16 S1U1B0(aqueous) 0.0050 m COS1U1B12S1U1B0 0.010 m Al(NOS1U1B13S1U1B0)S1U1B13S1U1B0 0.050 m NaCl 0.020 m NHS1U1B14S1U1B0Cl

The Answer of highest boiling point and largest van't Hoff is...

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH3OH (d = 0.792 g/mL)and 387 mL of CH3CH2CH2OH (d = 0.811 g/mL).

A) 0.630 m B) 0.812 m C) 1.57 m D) 2.01 m E) 4.98 m A) 0.630 m B) 0.812 m C) 1.57 m D) 2.01 m E) 4.98 m

Exam 13: Solutions

Determine the freezing point depression of a solution that contains 30.7 g glycerin (C₃H₈O₃,molar mass = 92.09 g/mol)in 376 mL of water.Some possibly useful constants for water are K_f = 1.86°C/m and K_b = 0.512°C/m.

(Multiple Choice)

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Question 21

Define cloud as a colloid.

(Multiple Choice)

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Question 22

Commercial grade HCl solutions are typically 39.0% (by mass)HCl in water.Determine the molarity of the HCl,if the solution has a density of 1.20 g/mL.

(Multiple Choice)

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Question 23

Identify the compounds that are soluble in both water and hexane.

(Multiple Choice)

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Question 24

Choose the aqueous solution with the highest vapor pressure.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.

(Multiple Choice)

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Question 25

Determine the solubility of N₂ in water exposed to air at 25°C if the atmospheric pressure is 2.0 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.

(Multiple Choice)

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Question 26

Give the reason that antifreeze is added to a car radiator.

(Multiple Choice)

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Question 27

Parts per billion requires a multiplication factor of ________.

(Multiple Choice)

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Question 28

A solution of CsF in water has X_CsF = 0.0700.What is the molality?

(Multiple Choice)

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Question 29

At 20°C,a 0.376 M aqueous solution of ammonium chloride has a density of 1.0045 g/mL.What is the mass % of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

(Multiple Choice)

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Question 30

Calculate the mole fraction of CaBr₂ in an aqueous solution prepared by dissolving 0.400 moles of CaBr₂ in 850.0 g of water.

(Multiple Choice)

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Question 31

Match the following.

0.050 m NaCl

highest boiling point

0.050 m C₆H₁₂O₆(aqueous)

largest van't Hoff factor

0.0050 m CO₂

solution of ionic compound with highest freezing point

Correct Answer:

Verified

0.050 m NaCl

0.050 m C₆H₁₂O₆(aqueous)

0.0050 m CO₂

0.010 m Al(NO₃)₃

0.050 m NaCl

(Matching)

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Question 32

A compound is found to have a molar mass of 598 g/mol.If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C,what is the osmotic pressure of the resulting solution?

(Multiple Choice)

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Question 33

If two substances are soluble in all proportions then they are ________ in each other.

(Multiple Choice)

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Question 34

Give the term for the amount of solute in moles per liter of solution.

(Multiple Choice)

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Question 35

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH₃OH (d = 0.792 g/mL)and 387 mL of CH₃CH₂CH₂OH (d = 0.811 g/mL).

(Multiple Choice)

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Question 36

To make rock candy,sugar is dissolved in hot water until no more can dissolve,then the solution is allowed to cool.A stick is placed in the sugar solution and crystals form on the stick.Describes what happens in terms of unsaturation,saturation,and supersaturation.

(Multiple Choice)

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Question 37

What is the weight percent of a caffeine solution made by dissolving 6.35 g of caffeine,C₈H₁₀N₄O₂,in 75 g of benzene,C₆H₆?

(Multiple Choice)

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Question 38

How many moles of AgCl are contained in 244 mL of 0.135 m AgCl solution? The density of the solution is 1.22 g/mL.

(Multiple Choice)

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Question 39

Determine the molality of a solution prepared by dissolving 1.00 moles of CaBr₂ in 23.0 moles H₂O.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 157

Exam 13: Solutions

Determine the freezing point depression of a solution that contains 30.7 g glycerin (C3H8O3,molar mass = 92.09 g/mol)in 376 mL of water.Some possibly useful constants for water are Kf = 1.86°C/m and Kb = 0.512°C/m.

Define cloud as a colloid.

Commercial grade HCl solutions are typically 39.0% (by mass)HCl in water.Determine the molarity of the HCl,if the solution has a density of 1.20 g/mL.

Identify the compounds that are soluble in both water and hexane.

Choose the aqueous solution with the highest vapor pressure.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.

Determine the solubility of N2 in water exposed to air at 25°C if the atmospheric pressure is 2.0 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10-4 M/atm.

Give the reason that antifreeze is added to a car radiator.

Parts per billion requires a multiplication factor of ________.

A solution of CsF in water has XCsF = 0.0700.What is the molality?

At 20°C,a 0.376 M aqueous solution of ammonium chloride has a density of 1.0045 g/mL.What is the mass % of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

Calculate the mole fraction of CaBr2 in an aqueous solution prepared by dissolving 0.400 moles of CaBr2 in 850.0 g of water.

A compound is found to have a molar mass of 598 g/mol.If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C,what is the osmotic pressure of the resulting solution?

If two substances are soluble in all proportions then they are ________ in each other.

Give the term for the amount of solute in moles per liter of solution.

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH3OH (d = 0.792 g/mL)and 387 mL of CH3CH2CH2OH (d = 0.811 g/mL).

To make rock candy,sugar is dissolved in hot water until no more can dissolve,then the solution is allowed to cool.A stick is placed in the sugar solution and crystals form on the stick.Describes what happens in terms of unsaturation,saturation,and supersaturation.

What is the weight percent of a caffeine solution made by dissolving 6.35 g of caffeine,C8H10N4O2,in 75 g of benzene,C6H6?

How many moles of AgCl are contained in 244 mL of 0.135 m AgCl solution? The density of the solution is 1.22 g/mL.

Determine the molality of a solution prepared by dissolving 1.00 moles of CaBr2 in 23.0 moles H2O.

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Determine the freezing point depression of a solution that contains 30.7 g glycerin (C₃H₈O₃,molar mass = 92.09 g/mol)in 376 mL of water.Some possibly useful constants for water are K_f = 1.86°C/m and K_b = 0.512°C/m.

Determine the solubility of N₂ in water exposed to air at 25°C if the atmospheric pressure is 2.0 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.

A solution of CsF in water has X_CsF = 0.0700.What is the molality?

At 20°C,a 0.376 M aqueous solution of ammonium chloride has a density of 1.0045 g/mL.What is the mass % of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

Calculate the mole fraction of CaBr₂ in an aqueous solution prepared by dissolving 0.400 moles of CaBr₂ in 850.0 g of water.

Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH₃OH (d = 0.792 g/mL)and 387 mL of CH₃CH₂CH₂OH (d = 0.811 g/mL).

What is the weight percent of a caffeine solution made by dissolving 6.35 g of caffeine,C₈H₁₀N₄O₂,in 75 g of benzene,C₆H₆?

Determine the molality of a solution prepared by dissolving 1.00 moles of CaBr₂ in 23.0 moles H₂O.