Determine the freezing point (°C)of a 0.015 molal aqueous solution of MgSO4. Assume i = 2.0 for MgSO4. The molal freezing-point-depression constant of water is 1.86°C/m.

A) -0.056 B) -0.028 C) -0.17 D) -0.084 E) 0.000 A) -0.056 B) -0.028 C) -0.17 D) -0.084 E) 0.000

The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H2O is __________% by mass. The molar mass of urea is 60.0 g/mol.

A) 44 B) 80 C) 0.44 D) 0.80 E) 0.48 A) 44 B) 80 C) 0.44 D) 0.80 E) 0.48

Exam 13: Properties of Solutions

A solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl₂ in this solution is __________ molar.

(Multiple Choice)

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Question 121

On a clear day at sea level, with a temperature of 25°C, the partial pressure of N₂ in air is 0.78 atm and the concentration of nitrogen in water is 5.3 × 10^-4 M. When the partial pressure of N₂ is __________ atm, the concentration in water is 1.1 × 10^-³ M.

(Multiple Choice)

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Question 122

The concentration of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H₂O is __________ molal.

(Multiple Choice)

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Question 123

Which one of the following substances is more likely to dissolve in CCl₄?

(Multiple Choice)

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Question 124

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H₂O is __________.

(Multiple Choice)

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Question 125

For a dilute aqueous solution, a concentration of 1 ppb also corresponds to a concentration of 1 __________ per liter of solution.

(Short Answer)

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Question 126

Calculate the molality of a 10.0% (by mass)aqueous solution of hydrochloric acid.

(Multiple Choice)

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Question 127

Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution.

(True/False)

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Question 128

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol)in 39g of H₂O is __________ M. The density of the solution is 1.3 g/mL.

(Multiple Choice)

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Question 129

Which of the following liquids will have the lowest freezing point?

(Multiple Choice)

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Question 130

Determine the freezing point (°C)of a 0.015 molal aqueous solution of MgSO₄. Assume i = 2.0 for MgSO₄. The molal freezing-point-depression constant of water is 1.86°C/m.

(Multiple Choice)

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Question 131

The Henry's law constant for helium gas in water at 30°C is 3.70 × 10^-4 M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is __________ M.

(Multiple Choice)

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Question 132

A solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of Cl^- in this solution is __________ M.

(Multiple Choice)

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Question 133

The concentration of nitrate ion in a solution that contains 0.900 M aluminum nitrate is _______ M.

(Multiple Choice)

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Question 134

The vapor pressure of pure water at 25°C is 23.8 torr. What is the vapor pressure (torr)of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW = 180.0 g/mol)in 95.0g of water?

(Multiple Choice)

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Question 135

The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H₂O is __________% by mass. The molar mass of urea is 60.0 g/mol.

(Multiple Choice)

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Question 136

An aqueous solution of a soluble compound (a nonelectrolyte)is prepared by dissolving 33.2 g of the compound in sufficient water to form 250 mL of solution. The solution has an osmotic pressure of 1.2 atm at25°C. What is the molar mass (g/mole)of the compound?

(Multiple Choice)

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Question 137

Which one of the following is most soluble in water?

(Multiple Choice)

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Question 138

A supersaturated solution __________.

(Multiple Choice)

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Question 139

A solution contains 28% phosphoric acid by mass. This means that __________.

(Multiple Choice)

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Question 140

Showing 121 - 140 of 151

Exam 13: Properties of Solutions

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 in this solution is __________ molar.

On a clear day at sea level, with a temperature of 25°C, the partial pressure of N2 in air is 0.78 atm and the concentration of nitrogen in water is 5.3 × 10-4 M. When the partial pressure of N2 is __________ atm, the concentration in water is 1.1 × 10-3 M.

The concentration of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H2O is __________ molal.

Which one of the following substances is more likely to dissolve in CCl4?

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H2O is __________.

For a dilute aqueous solution, a concentration of 1 ppb also corresponds to a concentration of 1 __________ per liter of solution.

Calculate the molality of a 10.0% (by mass)aqueous solution of hydrochloric acid.

Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution.

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol)in 39g of H2O is __________ M. The density of the solution is 1.3 g/mL.

Which of the following liquids will have the lowest freezing point?

Determine the freezing point (°C)of a 0.015 molal aqueous solution of MgSO4. Assume i = 2.0 for MgSO4. The molal freezing-point-depression constant of water is 1.86°C/m.

The Henry's law constant for helium gas in water at 30°C is 3.70 × 10-4 M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is __________ M.

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of Cl- in this solution is __________ M.

The concentration of nitrate ion in a solution that contains 0.900 M aluminum nitrate is _______ M.

The vapor pressure of pure water at 25°C is 23.8 torr. What is the vapor pressure (torr)of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW = 180.0 g/mol)in 95.0g of water?

The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H2O is __________% by mass. The molar mass of urea is 60.0 g/mol.

An aqueous solution of a soluble compound (a nonelectrolyte)is prepared by dissolving 33.2 g of the compound in sufficient water to form 250 mL of solution. The solution has an osmotic pressure of 1.2 atm at25°C. What is the molar mass (g/mole)of the compound?

Which one of the following is most soluble in water?

A supersaturated solution __________.

A solution contains 28% phosphoric acid by mass. This means that __________.

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A solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl₂ in this solution is __________ molar.

On a clear day at sea level, with a temperature of 25°C, the partial pressure of N₂ in air is 0.78 atm and the concentration of nitrogen in water is 5.3 × 10^-4 M. When the partial pressure of N₂ is __________ atm, the concentration in water is 1.1 × 10^-³ M.

The concentration of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H₂O is __________ molal.

Which one of the following substances is more likely to dissolve in CCl₄?

The mole fraction of urea (MW = 60.0 g/mol)in a solution prepared by dissolving 16 g of urea in 39g of H₂O is __________.

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol)in 39g of H₂O is __________ M. The density of the solution is 1.3 g/mL.

Determine the freezing point (°C)of a 0.015 molal aqueous solution of MgSO₄. Assume i = 2.0 for MgSO₄. The molal freezing-point-depression constant of water is 1.86°C/m.

The Henry's law constant for helium gas in water at 30°C is 3.70 × 10^-4 M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is __________ M.

A solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of Cl^- in this solution is __________ M.

The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H₂O is __________% by mass. The molar mass of urea is 60.0 g/mol.