What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? (For water,Kf = 1.86°C/m)

A) 17.6°C B) -176°C C) -1.50°C D) 1.50°C E) -17.6°C A) 17.6°C B) -176°C C) -1.50°C D) 1.50°C E) -17.6°C

Copper(II)bromide is used as a wood preservative.What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution?

A) 134 g B) 209 g C) 372 g D) 750 g E) 938 g A) 134 g B) 209 g C) 372 g D) 750 g E) 938 g

What is the percent CdSO4 by mass in a 1.00 molal aqueous CdSO4 solution?

A) 0.001% B) 0.10% C) 17.2% D) 20.8% E) 24.4% A) 0.001% B) 0.10% C) 17.2% D) 20.8% E) 24.4%

What mass of water is required to dissolve 25.31 g of potassium nitrate (KNO3)in order to prepare a 0.1982 m solution?

A) 0.5101 kg B) 0.1277 kg C) 1.000.kg D) 1.263 kg E) 0.7917 kg A) 0.5101 kg B) 0.1277 kg C) 1.000.kg D) 1.263 kg E) 0.7917 kg

Exam 13: Physical Properties of Solutions

Below is a diagram representing two chambers containing solvent A,separated by a semipermeable membrane (a dashed line)which allows only solvent A to pass through. If a solute X is added to the chamber on the left,which diagram below best represents how the system will respond in order to reach a new equilibrium?

(Multiple Choice)

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Question 121

What mass of ethanol (C₂H₅OH),a nonelectrolyte,must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL.(K_f of water is 1.86°C/m.)

(Multiple Choice)

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Question 122

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed,the pressure inside will increase above atmospheric pressure.Explain.

(Essay)

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Question 123

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C₂H₆O₂) and 85.0 g H₂O? (For water,K_f = 1.86°C/m)

(Multiple Choice)

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Question 124

Osmosis is the selective passage of solvent molecules through a porous membrane from a more concentrated solution to a more dilute one.

(True/False)

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Question 125

The density of a 20.3 M CH₃OH (methanol)solution is 0.858 g/mL.What is the molality of this solution? H₂O is the solvent.

(Multiple Choice)

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Question 126

Copper(II)bromide is used as a wood preservative.What mass of CuBr₂ is needed to prepare 750.0 mL of a 1.25 M solution?

(Multiple Choice)

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Question 127

Select the strongest electrolyte from the following set.

(Multiple Choice)

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Question 128

What is the name of the process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner?

(Short Answer)

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Question 129

The is the scattered light that is caused by the dispersed phase of a colloid that has a beam of light passed through it.

(Short Answer)

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Question 130

______________ is the process used to stabilize a colloid that would otherwise not stay dispersed.

(Short Answer)

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Question 131

Which solution has the highest vapor pressure?

(Multiple Choice)

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Question 132

Below is a diagram representing a solvent A(l)in a 1-L beaker,and a solute X dissolved in the solvent.Solvent A has a density of 0.8 g/mL,and a molar mass of 40 g/mol. Solute X has a molar mass of 30 g/mol.Each circle of X represents 1 mol of X.Assume that the solute addition does not significantly change the volume of liquid in the beaker. What is the molality of the solute X in this solution?

(Multiple Choice)

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Question 133

What is the percent CdSO₄ by mass in a 1.00 molal aqueous CdSO₄ solution?

(Multiple Choice)

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Question 134

Benzaldehyde (106.12 g/mol),also known as oil of almonds,is used in the manufacture of dyes and perfumes and in flavorings.What would be the freezing point of a solution prepared by dissolving 75.00 g of benzaldehyde in 850.0 g of ethanol? (For ethanol,K_f = 1.99°C/m; freezing point of pure ethanol = -117.3°C)

(Multiple Choice)

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Question 135

Which statement is false?

(Multiple Choice)

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Question 136

What mass of water is required to dissolve 25.31 g of potassium nitrate (KNO₃)in order to prepare a 0.1982 m solution?

(Multiple Choice)

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Question 137

Potassium fluoride is used for frosting glass.Calculate the molarity of a solution prepared by dissolving 78.6 g of KF in enough water to produce 225 mL of solution.

(Multiple Choice)

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Question 138

Cadmium bromide is used in photography and lithography.What is the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water?

(Multiple Choice)

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Question 139

The osmotic pressure of a 0.82 M HCl solution is 35.9 atm at 18°C.Calculate the van't Hoff factor for HCl at this concentration.

(Multiple Choice)

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Question 140

Showing 121 - 140 of 147

Exam 13: Physical Properties of Solutions

What mass of ethanol (C2H5OH),a nonelectrolyte,must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL.(Kf of water is 1.86°C/m.)

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed,the pressure inside will increase above atmospheric pressure.Explain.

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? (For water,Kf = 1.86°C/m)

Osmosis is the selective passage of solvent molecules through a porous membrane from a more concentrated solution to a more dilute one.

The density of a 20.3 M CH3OH (methanol)solution is 0.858 g/mL.What is the molality of this solution? H2O is the solvent.

Copper(II)bromide is used as a wood preservative.What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution?

Select the strongest electrolyte from the following set.

What is the name of the process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner?

The ______________ ______________ is the scattered light that is caused by the dispersed phase of a colloid that has a beam of light passed through it.

______________ is the process used to stabilize a colloid that would otherwise not stay dispersed.

Which solution has the highest vapor pressure?

What is the percent CdSO4 by mass in a 1.00 molal aqueous CdSO4 solution?

Which statement is false?

What mass of water is required to dissolve 25.31 g of potassium nitrate (KNO3)in order to prepare a 0.1982 m solution?

Potassium fluoride is used for frosting glass.Calculate the molarity of a solution prepared by dissolving 78.6 g of KF in enough water to produce 225 mL of solution.

Cadmium bromide is used in photography and lithography.What is the molality of a solution prepared by dissolving 45.38 g of CdBr2 in 375.0 g of water?

The osmotic pressure of a 0.82 M HCl solution is 35.9 atm at 18°C.Calculate the van't Hoff factor for HCl at this concentration.

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What mass of ethanol (C₂H₅OH),a nonelectrolyte,must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL.(K_f of water is 1.86°C/m.)

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C₂H₆O₂) and 85.0 g H₂O? (For water,K_f = 1.86°C/m)

The density of a 20.3 M CH₃OH (methanol)solution is 0.858 g/mL.What is the molality of this solution? H₂O is the solvent.

Copper(II)bromide is used as a wood preservative.What mass of CuBr₂ is needed to prepare 750.0 mL of a 1.25 M solution?

The is the scattered light that is caused by the dispersed phase of a colloid that has a beam of light passed through it.

What is the percent CdSO₄ by mass in a 1.00 molal aqueous CdSO₄ solution?

What mass of water is required to dissolve 25.31 g of potassium nitrate (KNO₃)in order to prepare a 0.1982 m solution?

Cadmium bromide is used in photography and lithography.What is the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water?