Determine the molarity of a solution containing 6.76 g BaCl2 in 750.0 mL of solution.

A) 3.25 \(\times\) 10-2 M B) 2.44 \(\times\) 10-2 M C) 9.01 \(\times\) 10-3 M D) 4.33 \(\times\) 10-2 M E) 9.01 M A) 3.25 \(\times\) 10-2 M B) 2.44 \(\times\) 10-2 M C) 9.01 \(\times\) 10-3 M D) 4.33 \(\times\) 10-2 M E) 9.01 M

What volume of a 0.771 M solution of CaCl2 contains 1.28 g of solute?

A) 66.8 mL B) 15.0 mL C) 1.66 mL D) 8.89 mL E) 85.0 mL A) 66.8 mL B) 15.0 mL C) 1.66 mL D) 8.89 mL E) 85.0 mL

Exam 11: Properties of Solutions

An ideal solution is formed from a mixture of the nonvolatile solute urea,CO(NH₂)₂,and methanol,CH₃OH.The vapor pressure of pure methanol at 20°C is 89 mmHg.If 4.4 g of urea is mixed with 39.9 g of methanol,calculate the vapor pressure of the methanol solution.

(Multiple Choice)

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Question 21

Calculate the mole fraction of NaCl in a solution prepared by dissolving 117 g NaCl in 1.15 kg H₂O.

(Multiple Choice)

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Question 22

Determine the molarity of a solution containing 6.76 g BaCl₂ in 750.0 mL of solution.

(Multiple Choice)

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Question 23

Solutions of benzene and toluene obey Raoult's law.The vapor pressures at 20°C are: benzene,76 torr;toluene,21 torr. -What is the mole fraction of benzene in a benzene-toluene solution whose vapor pressure is 51 torr at 20°C?

(Multiple Choice)

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Question 24

All of the following are colligative properties except:

(Multiple Choice)

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Question 25

At a given temperature,you have a mixture of benzene (vapor pressure of pure benzene = 745 torr)and toluene (vapor pressure of pure toluene = 290.torr).The mole fraction of benzene in the solution is 0.590.Assuming ideal behavior,calculate the mole fraction of toluene in the vapor above the solution.

(Multiple Choice)

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Question 26

A liquid-liquid solution is called an ideal solution if: I.It obeys PV = nRT. II.It obeys Raoult's law. III.Solute-solute,solvent-solvent,and solute-solvent interactions are very similar. IV.Solute-solute,solvent-solvent,and solute-solvent interactions are quite different.

(Multiple Choice)

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Question 27

What volume of a 0.771 M solution of CaCl₂ contains 1.28 g of solute?

(Multiple Choice)

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Question 28

The observed van't Hoff factor for an electrolyte is less than the expected factor because of __________.

(Multiple Choice)

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Question 29

The lattice energy of KF is 808 kJ/mol and its heat of solution is -17.7 kJ/mol.Calculate the hydration of energy of KF(s).

(Multiple Choice)

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Question 30

Polyethylene is a synthetic polymer or plastic with many uses.1.36 g of a polyethylene sample was dissolved in enough benzene to make 100.mL of solution,and the osmotic pressure was found to be 1.86 torr at 25^oC.What is the approximate molar mass of the polyethylene?

(Multiple Choice)

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Question 31

If 2.00 g of helium gas and 3.82 g of oxygen gas are mixed together,what is the mole fraction of helium in the solution?

(Multiple Choice)

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Question 32

The vapor pressure of water at 90°C is 0.692 atm.What is the vapor pressure (in atm)of a solution made by dissolving 4.13 mole(s)of CsF(s)in 1.00 kg of water? Assume that Raoult's law applies.

(Multiple Choice)

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Question 33

Which of the following correctly states the relationship between temperature and the solubility of a substance in water?

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Question 34

Solutions of benzene and toluene obey Raoult's law.The vapor pressures at 20°C are: benzene,76 torr;toluene,21 torr. -If the mole fraction of benzene in a particular benzene-toluene solution is 0.64,what is the mole fraction of benzene in the vapor phase in equilibrium with that solution?

(Multiple Choice)

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Question 35

Benzene and toluene form an ideal solution.At 298 K,what is the mole fraction of benzene in the liquid that is in equilibrium with a vapor that has equal partial pressures of benzene and toluene? At 298 K,the vapor pressures of pure benzene and pure toluene are 95 and 28 torr,respectively.

(Multiple Choice)

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Question 36

For each of the following solutions,describe the deviation with respect to Raoult's Law. -hexane (C₆H₁₄)and chloroform (CHCl₃)

(Multiple Choice)

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Question 37

A 5.05-gram sample of a compound is dissolved in enough water to form 100.0 mL of solution.This solution has an osmotic pressure of 25.0 torr at 25°C.If it is assumed that each molecule of the solute dissociates into two particles (in this solvent),what is the molar mass of this solute?

(Multiple Choice)

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Question 38

You have a 10.40-g mixture of table sugar (C₁₂H₂₂O₁₁)and table salt (NaCl).When this mixture is dissolved in 150.g of water,the freezing point is found to be -2.24°C.Calculate the percent by mass of sugar in the original mixture.

(Multiple Choice)

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Question 39

A solution is prepared from 53.8 g of a nonvolatile,nondissociating solute and 85.0 g of water.The vapor pressure of the solution at 60°C is 132 torr.The vapor pressure of water at 60°C is 150.torr.What is the molar mass of the solute?

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Question 40

Showing 21 - 40 of 108

Exam 11: Properties of Solutions

An ideal solution is formed from a mixture of the nonvolatile solute urea,CO(NH2)2,and methanol,CH3OH.The vapor pressure of pure methanol at 20°C is 89 mmHg.If 4.4 g of urea is mixed with 39.9 g of methanol,calculate the vapor pressure of the methanol solution.

Calculate the mole fraction of NaCl in a solution prepared by dissolving 117 g NaCl in 1.15 kg H2O.

Determine the molarity of a solution containing 6.76 g BaCl2 in 750.0 mL of solution.

Solutions of benzene and toluene obey Raoult's law.The vapor pressures at 20°C are: benzene,76 torr;toluene,21 torr. -What is the mole fraction of benzene in a benzene-toluene solution whose vapor pressure is 51 torr at 20°C?

All of the following are colligative properties except:

A liquid-liquid solution is called an ideal solution if: I.It obeys PV = nRT. II.It obeys Raoult's law. III.Solute-solute,solvent-solvent,and solute-solvent interactions are very similar. IV.Solute-solute,solvent-solvent,and solute-solvent interactions are quite different.

What volume of a 0.771 M solution of CaCl2 contains 1.28 g of solute?

The observed van't Hoff factor for an electrolyte is less than the expected factor because of __________.

The lattice energy of KF is 808 kJ/mol and its heat of solution is -17.7 kJ/mol.Calculate the hydration of energy of KF(s).

Polyethylene is a synthetic polymer or plastic with many uses.1.36 g of a polyethylene sample was dissolved in enough benzene to make 100.mL of solution,and the osmotic pressure was found to be 1.86 torr at 25oC.What is the approximate molar mass of the polyethylene?

If 2.00 g of helium gas and 3.82 g of oxygen gas are mixed together,what is the mole fraction of helium in the solution?

The vapor pressure of water at 90°C is 0.692 atm.What is the vapor pressure (in atm)of a solution made by dissolving 4.13 mole(s)of CsF(s)in 1.00 kg of water? Assume that Raoult's law applies.

Which of the following correctly states the relationship between temperature and the solubility of a substance in water?

Solutions of benzene and toluene obey Raoult's law.The vapor pressures at 20°C are: benzene,76 torr;toluene,21 torr. -If the mole fraction of benzene in a particular benzene-toluene solution is 0.64,what is the mole fraction of benzene in the vapor phase in equilibrium with that solution?

Benzene and toluene form an ideal solution.At 298 K,what is the mole fraction of benzene in the liquid that is in equilibrium with a vapor that has equal partial pressures of benzene and toluene? At 298 K,the vapor pressures of pure benzene and pure toluene are 95 and 28 torr,respectively.

For each of the following solutions,describe the deviation with respect to Raoult's Law. -hexane (C6H14)and chloroform (CHCl3)

A 5.05-gram sample of a compound is dissolved in enough water to form 100.0 mL of solution.This solution has an osmotic pressure of 25.0 torr at 25°C.If it is assumed that each molecule of the solute dissociates into two particles (in this solvent),what is the molar mass of this solute?

You have a 10.40-g mixture of table sugar (C12H22O11)and table salt (NaCl).When this mixture is dissolved in 150.g of water,the freezing point is found to be -2.24°C.Calculate the percent by mass of sugar in the original mixture.

A solution is prepared from 53.8 g of a nonvolatile,nondissociating solute and 85.0 g of water.The vapor pressure of the solution at 60°C is 132 torr.The vapor pressure of water at 60°C is 150.torr.What is the molar mass of the solute?

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An ideal solution is formed from a mixture of the nonvolatile solute urea,CO(NH₂)₂,and methanol,CH₃OH.The vapor pressure of pure methanol at 20°C is 89 mmHg.If 4.4 g of urea is mixed with 39.9 g of methanol,calculate the vapor pressure of the methanol solution.

Calculate the mole fraction of NaCl in a solution prepared by dissolving 117 g NaCl in 1.15 kg H₂O.

Determine the molarity of a solution containing 6.76 g BaCl₂ in 750.0 mL of solution.

What volume of a 0.771 M solution of CaCl₂ contains 1.28 g of solute?

Polyethylene is a synthetic polymer or plastic with many uses.1.36 g of a polyethylene sample was dissolved in enough benzene to make 100.mL of solution,and the osmotic pressure was found to be 1.86 torr at 25^oC.What is the approximate molar mass of the polyethylene?

For each of the following solutions,describe the deviation with respect to Raoult's Law. -hexane (C₆H₁₄)and chloroform (CHCl₃)

You have a 10.40-g mixture of table sugar (C₁₂H₂₂O₁₁)and table salt (NaCl).When this mixture is dissolved in 150.g of water,the freezing point is found to be -2.24°C.Calculate the percent by mass of sugar in the original mixture.