A solution composed of 5 moles of acetone (CH3COCH3,P°A = 324 mmHg)and 5 moles of chloroform (CHCl3,P° = 274 mmHg)has a vapor pressure of 236 mmHg.Which one of the following statements is completely true about this solution?

A) The solution shows a negative deviation from Raoult's law and thus possesses a maximum boiling azeotrope. B) The solution process is exothermic because the forces between unlike molecules are weaker than those between like molecules. C) The solution shows a positive deviation from Raoult's law. D) The solution possesses a minimum boiling azeotrope because it shows a negative deviation from Raoult's law. E) The solution obeys Raoult's Law. A) The solution shows a negative deviation from Raoult's law and thus possesses a maximum boiling azeotrope. B) The solution process is exothermic because the forces between unlike molecules are weaker than those between like molecules. C) The solution shows a positive deviation from Raoult's law. D) The solution possesses a minimum boiling azeotrope because it shows a negative deviation from Raoult's law. E) The solution obeys Raoult's Law.

Exam 14: Solutions and Their Physical Properties

At 20 °C,a 2.32 mol L^-1 aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of Cl is

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Question 1

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At a given temperature the vapour pressures of benzene and toluene are 183 mmHg and 59.2 mmHg,respectively.Calculate the total vapour pressure over a solution of benzene and toluene with x_benzene = 0.580.

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Nitrogen gas has a Henry's law constant k = 6.3 × 10^-4 M/atm at 25 °C.The "bends" in divers results from bubbles of N₂(g)being rapidly released from body fluids when a diver ascends to the surface too quickly.Which of the following would be a good substitute for N₂(g)in order to make the "bends" less severe?

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A solution is prepared by dissolving 7.00 g of glycerin ( C₃H₈O₃)in 201 g of ethanol The freezing point of the solution is ________ °C.The freezing point of pure ethanol is .The molal freezing point depression constant ( )for ethanol is The molar masses of glycerin and of ethanol are 92.1 g mol^-1 and 46.1 g mol^-1,respectively.

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Question 4

Moles of solute per mole of solution is a definition of ________.

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Question 5

Determine the osmotic pressure at 25 °C of an aqueous solution that is 0.028 M NaNO₃.

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Question 6

What is the mole fraction of ethanol in a solution made by dissolving 29.2 g of ethanol,C₂H₅OH,in 53.6 g of water?

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Question 7

What is the osmotic pressure in mmHg of 6.00 L of a 0.108 M solution at 30 °C if three moles of ions are produced in aqueous solution for every mole of solute dissolved?

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Question 8

138.0 grams of ethanol (46.0 g/mol),99.0 grams of water (18.0 g/mol),and 80.0 grams of methanol (32.0 g/mol)comprise a solution.What is the mole fraction of methanol present in the solution?

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Question 9

Which of the following compounds has the highest aqueous solubility?

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Question 10

A 1.38 M solution of nitric acid (63.g/mol)in water (18.0 g/mol)has a density of 1.04 g/mL.What is the mole fraction of nitric acid in the solution?

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Question 11

The solubilities of ammonium bromide,NH₄Br,in water at 0 °C,20 °C,and 80 °C are as follows: $The solubilities of ammonium bromide,NH<sub>4</sub>Br,in water at 0 °C,20 °C,and 80 °C are as follows: Which of the following fractional crystallization schemes would produce the highest percent yield for the recrystallization of ammonium bromide?$ Which of the following fractional crystallization schemes would produce the highest percent yield for the recrystallization of ammonium bromide?

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Question 12

A solution composed of 5 moles of acetone (CH₃COCH₃,P°_A = 324 mmHg)and 5 moles of chloroform (CHCl₃,P° = 274 mmHg)has a vapor pressure of 236 mmHg.Which one of the following statements is completely true about this solution?

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Question 13

Adding a solute to a solvent lowers the freezing point of the solution compared to the pure solvent.

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Question 14

The vapor pressures of pure propyl alcohol and isopropyl alcohol are 21.0 mmHg and 45.2 mmHg,respectively,at 25 °C.What is the composition of the vapor in equilibrium with a propyl alcohol - isopropyl alcohol solution in which the mole fraction of propyl alcohol is 0.250?

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Question 15

Which of the following aqueous solutions has the highest boiling point?

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Question 16

The concentration unit used to calculate boiling point elevation is ________.

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Question 17

An unsaturated solution will have some undissolved solid in the bottom of the container.

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Question 18

A solution is prepared by adding 30.00 g of lactose (milk sugar)to 110.0 g of water at The partial pressure of water above the solution is ________ Torr.The vapour pressure of pure water at 55 °C is 0.1553 bar.The MW of lactose is

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Question 19

The stronger the forces between solute and solvent molecules,the more exothermic the solution process.

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Question 20

Showing 1 - 20 of 132

Exam 14: Solutions and Their Physical Properties

At 20 °C,a 2.32 mol L-1 aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of Cl is

At a given temperature the vapour pressures of benzene and toluene are 183 mmHg and 59.2 mmHg,respectively.Calculate the total vapour pressure over a solution of benzene and toluene with xbenzene = 0.580.

Moles of solute per mole of solution is a definition of ________.

Determine the osmotic pressure at 25 °C of an aqueous solution that is 0.028 M NaNO3.

What is the mole fraction of ethanol in a solution made by dissolving 29.2 g of ethanol,C2H5OH,in 53.6 g of water?

What is the osmotic pressure in mmHg of 6.00 L of a 0.108 M solution at 30 °C if three moles of ions are produced in aqueous solution for every mole of solute dissolved?

138.0 grams of ethanol (46.0 g/mol),99.0 grams of water (18.0 g/mol),and 80.0 grams of methanol (32.0 g/mol)comprise a solution.What is the mole fraction of methanol present in the solution?

Which of the following compounds has the highest aqueous solubility?

A 1.38 M solution of nitric acid (63.g/mol)in water (18.0 g/mol)has a density of 1.04 g/mL.What is the mole fraction of nitric acid in the solution?

The solubilities of ammonium bromide,NH4Br,in water at 0 °C,20 °C,and 80 °C are as follows: Which of the following fractional crystallization schemes would produce the highest percent yield for the recrystallization of ammonium bromide?

A solution composed of 5 moles of acetone (CH3COCH3,P°A = 324 mmHg)and 5 moles of chloroform (CHCl3,P° = 274 mmHg)has a vapor pressure of 236 mmHg.Which one of the following statements is completely true about this solution?

Adding a solute to a solvent lowers the freezing point of the solution compared to the pure solvent.

The vapor pressures of pure propyl alcohol and isopropyl alcohol are 21.0 mmHg and 45.2 mmHg,respectively,at 25 °C.What is the composition of the vapor in equilibrium with a propyl alcohol - isopropyl alcohol solution in which the mole fraction of propyl alcohol is 0.250?

Which of the following aqueous solutions has the highest boiling point?

The concentration unit used to calculate boiling point elevation is ________.

An unsaturated solution will have some undissolved solid in the bottom of the container.

A solution is prepared by adding 30.00 g of lactose (milk sugar)to 110.0 g of water at The partial pressure of water above the solution is ________ Torr.The vapour pressure of pure water at 55 °C is 0.1553 bar.The MW of lactose is

The stronger the forces between solute and solvent molecules,the more exothermic the solution process.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

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At 20 °C,a 2.32 mol L^-1 aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of Cl is

At a given temperature the vapour pressures of benzene and toluene are 183 mmHg and 59.2 mmHg,respectively.Calculate the total vapour pressure over a solution of benzene and toluene with x_benzene = 0.580.

Determine the osmotic pressure at 25 °C of an aqueous solution that is 0.028 M NaNO₃.

What is the mole fraction of ethanol in a solution made by dissolving 29.2 g of ethanol,C₂H₅OH,in 53.6 g of water?

A solution composed of 5 moles of acetone (CH₃COCH₃,P°_A = 324 mmHg)and 5 moles of chloroform (CHCl₃,P° = 274 mmHg)has a vapor pressure of 236 mmHg.Which one of the following statements is completely true about this solution?