What is the mass percent CH3OH of a 0.256 m CH3OH(aq)solution.

A) 0.819 % B) 0.992 % C) 1.23 % D) 1.29 % E) 1.51 % A) 0.819 % B) 0.992 % C) 1.23 % D) 1.29 % E) 1.51 %

Calculate the freezing point of a solution made from 22.0 g of octane (C8H18)dissolved in 148.0 g of benzene.Benzene freezes at 5.50°C and its Kf value is 5.12°C/m.

A) -1.16°C B) 0.98°C C) 5.49°C D) 6.66°C E) 12.2°C A) -1.16°C B) 0.98°C C) 5.49°C D) 6.66°C E) 12.2°C

Exam 12: Physical Properties of Solutions

The vapor pressure of water at 45.0 °C is 71.93 mmHg.What is the vapor pressure of water over a solution prepared from 75.0 g of citric acid (C₆H₈O₇)in 0.420 kg of water at this temperature?

Free

(Multiple Choice)

5.0/5

(45)

Question 1

Correct Answer:

Verified

What is the osmotic pressure of a 0.25 M solution of sucrose at 37°C? (R = 0.0821 L.atm/K.mol)

Free

(Multiple Choice)

4.8/5

(42)

Question 2

Correct Answer:

Verified

What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071 g/mL?

Free

(Multiple Choice)

4.8/5

(30)

Question 3

Correct Answer:

Verified

A 1.35 m solution of NaOCl in water is prepared.What is the mole fraction of the NaOCl?

(Multiple Choice)

4.8/5

(43)

Question 4

What is the mass percent CH₃OH of a 0.256 m CH₃OH(aq)solution.

(Multiple Choice)

4.8/5

(33)

Question 5

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)

4.9/5

(31)

Question 6

What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091 g/mL?

(Multiple Choice)

4.9/5

(33)

Question 7

Some KCl is dissolved in water at 25°C, where it completely dissociates.The vapor pressure of pure water at 25°C is 28.3 mmHg.Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25°C by 5%.

(Short Answer)

4.9/5

(29)

Question 8

What is the osmotic pressure of a solution prepared from 13.7 g of the electrolyte HCl and enough water to make 0.500 L of solution at 18°C?

(Multiple Choice)

4.8/5

(37)

Question 9

To interconvert the concentration units of molality (m)and mass percent, you must also know the density of the solution.

(True/False)

4.9/5

(37)

Question 10

Calculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of water.

(Multiple Choice)

4.8/5

(39)

Question 11

A solution that contains 55.0 g of ascorbic acid (VitaminC)in 250.g of water freezes at -2.34°C.Calculate the molar mass (in units of g/mol)of the solute.K_f of water is 1.86°C/m.

(Multiple Choice)

4.9/5

(34)

Question 12

Calculate the freezing point of a solution made from 22.0 g of octane (C₈H₁₈)dissolved in 148.0 g of benzene.Benzene freezes at 5.50°C and its K_f value is 5.12°C/m.

(Multiple Choice)

4.8/5

(43)

Question 13

The vapor pressure of a solution depends on the chemical nature of the non-volatile solute

(True/False)

4.7/5

(36)

Question 14

Using your knowledge of osmosis or osmotic pressure explain the following statement: Meat that is salted before cooking tends to dry out.

(Essay)

4.9/5

(37)

Question 15

The solubility of gases in water usually increases with

(Multiple Choice)

4.8/5

(31)

Question 16

Determine the mass percent HCl in a 1.2 M solution of hydrochloric acid with a density of 1.019 g/mL?

(Multiple Choice)

4.8/5

(40)

Question 17

Assuming 100% dissociation, which of the following compounds is listed incorrectly with its van't Hoff factor i?

(Multiple Choice)

4.8/5

(38)

Question 18

The vapor pressure of water at 20°C is 17.5 mmHg.What is the vapor pressure of water over a solution prepared from 2.00 × 10² g of sucrose (C₁₂H₂₂O₁₁)and 3.50 × 10² g water?

(Multiple Choice)

4.8/5

(43)

Question 19

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? K_b of water is 0.52°C/m.Assume the density of the solution is the same as that of pure water.

(Multiple Choice)

4.9/5

(31)

Question 20

Showing 1 - 20 of 122

Exam 12: Physical Properties of Solutions

The vapor pressure of water at 45.0 °C is 71.93 mmHg.What is the vapor pressure of water over a solution prepared from 75.0 g of citric acid (C6H8O7)in 0.420 kg of water at this temperature?

What is the osmotic pressure of a 0.25 M solution of sucrose at 37°C? (R = 0.0821 L.atm/K.mol)

What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071 g/mL?

A 1.35 m solution of NaOCl in water is prepared.What is the mole fraction of the NaOCl?

What is the mass percent CH3OH of a 0.256 m CH3OH(aq)solution.

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.

What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091 g/mL?

Some KCl is dissolved in water at 25°C, where it completely dissociates.The vapor pressure of pure water at 25°C is 28.3 mmHg.Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25°C by 5%.

What is the osmotic pressure of a solution prepared from 13.7 g of the electrolyte HCl and enough water to make 0.500 L of solution at 18°C?

To interconvert the concentration units of molality (m)and mass percent, you must also know the density of the solution.

Calculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of water.

A solution that contains 55.0 g of ascorbic acid (VitaminC)in 250.g of water freezes at -2.34°C.Calculate the molar mass (in units of g/mol)of the solute.Kf of water is 1.86°C/m.

Calculate the freezing point of a solution made from 22.0 g of octane (C8H18)dissolved in 148.0 g of benzene.Benzene freezes at 5.50°C and its Kf value is 5.12°C/m.

The vapor pressure of a solution depends on the chemical nature of the non-volatile solute

Using your knowledge of osmosis or osmotic pressure explain the following statement: Meat that is salted before cooking tends to dry out.

The solubility of gases in water usually increases with

Determine the mass percent HCl in a 1.2 M solution of hydrochloric acid with a density of 1.019 g/mL?

Assuming 100% dissociation, which of the following compounds is listed incorrectly with its van't Hoff factor i?

The vapor pressure of water at 20°C is 17.5 mmHg.What is the vapor pressure of water over a solution prepared from 2.00 × 102 g of sucrose (C12H22O11)and 3.50 × 102 g water?

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? Kb of water is 0.52°C/m.Assume the density of the solution is the same as that of pure water.

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The vapor pressure of water at 45.0 °C is 71.93 mmHg.What is the vapor pressure of water over a solution prepared from 75.0 g of citric acid (C₆H₈O₇)in 0.420 kg of water at this temperature?

What is the mass percent CH₃OH of a 0.256 m CH₃OH(aq)solution.

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.

A solution that contains 55.0 g of ascorbic acid (VitaminC)in 250.g of water freezes at -2.34°C.Calculate the molar mass (in units of g/mol)of the solute.K_f of water is 1.86°C/m.

Calculate the freezing point of a solution made from 22.0 g of octane (C₈H₁₈)dissolved in 148.0 g of benzene.Benzene freezes at 5.50°C and its K_f value is 5.12°C/m.

The vapor pressure of water at 20°C is 17.5 mmHg.What is the vapor pressure of water over a solution prepared from 2.00 × 10² g of sucrose (C₁₂H₂₂O₁₁)and 3.50 × 10² g water?

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? K_b of water is 0.52°C/m.Assume the density of the solution is the same as that of pure water.