A solution prepared by dissolving 4.00 g KCl in 36.0 g H2O is said to be:

A) 11.1% KCl by mass B) 0.100% KCl by mass C) 0.111% KCl by mass D) 10.0% KCl by mass E) 9.00% KCl by mass A) 11.1% KCl by mass B) 0.100% KCl by mass C) 0.111% KCl by mass D) 10.0% KCl by mass E) 9.00% KCl by mass

Henry's Law constants for aqueous solutions at 25 °C are 8.20 × 10-7 m/mmHg for N2 and 1.62 × 10-6 m/mmHg for O2.Determine the solubility of oxygen in water under an atmospheric pressure of 760 mmHg,assuming that air is 80% N2 and 20% O2.

A) 6.2 × 10-3 m B) 2.5 × 10-4 m C) 1.3 × 10-4 m D) 5.0 × 10-4 m E) 1.2 × 10-3 m A) 6.2 × 10-3 m B) 2.5 × 10-4 m C) 1.3 × 10-4 m D) 5.0 × 10-4 m E) 1.2 × 10-3 m

How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?

A) 54.0 g B) 74.3 g C) 87.5 g D) 114 g A) 54.0 g B) 74.3 g C) 87.5 g D) 114 g

Arrange the following three aqueous solutions (all 250 cm3 in volume)according to decreasing osmotic pressure at 273 K: 5 g of C2H5OH,5 g C6H12O6 ,and 5 g C12H22O11.

A) C2H5OH > C6H12O6 > C12H22O11 B) C2H5OH > C6H12O6 = C12H22O11 C) C6H12O6 > C2H5OH > C12H22O11 D) C12H22O11 > C6H12O6 > C2H5OH E) C12H22O11 > C2H5OH> C6H12O6 A) C2H5OH > C6H12O6 > C12H22O11 B) C2H5OH > C6H12O6 = C12H22O11 C) C6H12O6 > C2H5OH > C12H22O11 D) C12H22O11 > C6H12O6 > C2H5OH E) C12H22O11 > C2H5OH> C6H12O6

Commercial perchloric acid is 70.0% by mass,HClO4(aq),and has a density of 1.67 g/mL.Calculate the molarity of perchloric acid in the solution.

A) 11.6 M B) 1.17 M C) 23.7 M D) 16.5 M A) 11.6 M B) 1.17 M C) 23.7 M D) 16.5 M

An aqueous solution contains 64.0 g of ethanol (C2H5OH)in 122.0 g of solution.What is the mole fraction of ethanol in the solution?

A) 0.301 B) 0.432 C) 0.205 D) 0.698 E) 0.317 A) 0.301 B) 0.432 C) 0.205 D) 0.698 E) 0.317

What molality of pentane is obtained by dissolving 15 g pentane,C5H12,in 245.0 g hexane,C6H14?

A) 0.058 mol kg-1 B) 0.068 mol kg-1 C) 0.85 mol kg-1 D) 61 mol kg-1 A) 0.058 mol kg-1 B) 0.068 mol kg-1 C) 0.85 mol kg-1 D) 61 mol kg-1

Solutions are made that contain 0.1 moles of each of the following compounds below in 100 g of H2O.Choose the compound whose solution will have the lowest freezing point.

A) MgCl2 B) KClO3 C) CO2 D) MgSO4 E) NaBr A) MgCl2 B) KClO3 C) CO2 D) MgSO4 E) NaBr

Exam 14: Solutions and Their Physical Properties

What is the molarity of a saturated solution of potassium sulfate if the solubility is 13 g per 100 g H₂O at 25 °C? The density of the solution is 1.1 g/mL

(Multiple Choice)

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Question 61

How many moles of ethylene glycol must be dissolved in 500 g of water (K_f = 1.86 °C m^-1)to lower the freezing point to -5.00 °C?

(Multiple Choice)

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Question 62

An aqueous solution has a normal boiling point of 103.0 °C.What is the freezing point of this solution? For water And

(Multiple Choice)

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Question 63

A solution prepared by dissolving 4.00 g KCl in 36.0 g H₂O is said to be:

(Multiple Choice)

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Question 64

A solution that can dissolve no more solute is called:

(Multiple Choice)

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Question 65

An isotonic solution will produce an osmotic pressure of 7.84 atm measured against pure water at human body temperature (37.0 °C).How many grams of sodium chloride must be dissolved in a liter of water to produce an isotonic solution?

(Multiple Choice)

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Question 66

The freezing point of pure benzene was measured as 5.49 °C.With the same benzene and the same equipment,the freezing point of a solution containing 6.60 g of an unknown molecular compound in 140 g of benzene was found to be 2.35 °C.The cryoscopic constant,K_f,for benzene is 5.12 °C kg/mol.Calculate the mole weight of the unknown.

(Multiple Choice)

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Question 67

We wish to lower the freezing point of the water in an automobile radiator to -40 °C.The total mass of water present is 12.0 kg.For which one of the following compounds would we have to use the greatest mass of solute to achieve this? You may assume that K_f for water = -1.86 °C/m and that all ionizable solutes are completely ionized with unit activity even at this high concentration.

(Multiple Choice)

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Question 68

Choose the INCORRECT statement.

(Multiple Choice)

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Question 69

Henry's Law constants for aqueous solutions at 25 °C are 8.20 × 10^-7 m/mmHg for N₂ and 1.62 × 10^-6 m/mmHg for O₂.Determine the solubility of oxygen in water under an atmospheric pressure of 760 mmHg,assuming that air is 80% N₂ and 20% O₂.

(Multiple Choice)

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Question 70

How much water must be added to 40.0 g of CaCl₂ to produce a solution that is 35.0 wt% CaCl₂?

(Multiple Choice)

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Question 71

Osmotic pressure is a colligative property.

(True/False)

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Question 72

Arrange the following three aqueous solutions (all 250 cm³ in volume)according to decreasing osmotic pressure at 273 K: 5 g of C₂H₅OH,5 g C₆H₁₂O₆ ,and 5 g C₁₂H₂₂O_11.

(Multiple Choice)

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Question 73

Which of the following pairs of liquids would likely form a nonideal solution?

(Multiple Choice)

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Question 74

Which of the following aqueous solutions has the lowest freezing point?

(Multiple Choice)

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Question 75

Commercial perchloric acid is 70.0% by mass,HClO₄(aq),and has a density of 1.67 g/mL.Calculate the molarity of perchloric acid in the solution.

(Multiple Choice)

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Question 76

An aqueous solution contains 64.0 g of ethanol (C₂H₅OH)in 122.0 g of solution.What is the mole fraction of ethanol in the solution?

(Multiple Choice)

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Question 77

What molality of pentane is obtained by dissolving 15 g pentane,C₅H₁₂,in 245.0 g hexane,C₆H₁₄?

(Multiple Choice)

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Question 78

A mixture of benzene and toluene has a total vapor pressure at 25 °C of 45.06 mmHg.What is the partial pressure of benzene in this solution? The vapor pressure of pure benzene and pure toluene at 25 °C are 95.03 mmHg and 28.40 mmHg respectively.

(Multiple Choice)

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Question 79

Solutions are made that contain 0.1 moles of each of the following compounds below in 100 g of H₂O.Choose the compound whose solution will have the lowest freezing point.

(Multiple Choice)

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Question 80

Showing 61 - 80 of 132

Exam 14: Solutions and Their Physical Properties

What is the molarity of a saturated solution of potassium sulfate if the solubility is 13 g per 100 g H2O at 25 °C? The density of the solution is 1.1 g/mL

How many moles of ethylene glycol must be dissolved in 500 g of water (Kf = 1.86 °C m-1)to lower the freezing point to -5.00 °C?

An aqueous solution has a normal boiling point of 103.0 °C.What is the freezing point of this solution? For water And

A solution prepared by dissolving 4.00 g KCl in 36.0 g H2O is said to be:

A solution that can dissolve no more solute is called:

An isotonic solution will produce an osmotic pressure of 7.84 atm measured against pure water at human body temperature (37.0 °C).How many grams of sodium chloride must be dissolved in a liter of water to produce an isotonic solution?

Choose the INCORRECT statement.

Henry's Law constants for aqueous solutions at 25 °C are 8.20 × 10-7 m/mmHg for N2 and 1.62 × 10-6 m/mmHg for O2.Determine the solubility of oxygen in water under an atmospheric pressure of 760 mmHg,assuming that air is 80% N2 and 20% O2.

How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?

Osmotic pressure is a colligative property.

Arrange the following three aqueous solutions (all 250 cm3 in volume)according to decreasing osmotic pressure at 273 K: 5 g of C2H5OH,5 g C6H12O6 ,and 5 g C12H22O11.

Which of the following pairs of liquids would likely form a nonideal solution?

Which of the following aqueous solutions has the lowest freezing point?

Commercial perchloric acid is 70.0% by mass,HClO4(aq),and has a density of 1.67 g/mL.Calculate the molarity of perchloric acid in the solution.

An aqueous solution contains 64.0 g of ethanol (C2H5OH)in 122.0 g of solution.What is the mole fraction of ethanol in the solution?

What molality of pentane is obtained by dissolving 15 g pentane,C5H12,in 245.0 g hexane,C6H14?

A mixture of benzene and toluene has a total vapor pressure at 25 °C of 45.06 mmHg.What is the partial pressure of benzene in this solution? The vapor pressure of pure benzene and pure toluene at 25 °C are 95.03 mmHg and 28.40 mmHg respectively.

Solutions are made that contain 0.1 moles of each of the following compounds below in 100 g of H2O.Choose the compound whose solution will have the lowest freezing point.

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

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What is the molarity of a saturated solution of potassium sulfate if the solubility is 13 g per 100 g H₂O at 25 °C? The density of the solution is 1.1 g/mL

How many moles of ethylene glycol must be dissolved in 500 g of water (K_f = 1.86 °C m^-1)to lower the freezing point to -5.00 °C?

A solution prepared by dissolving 4.00 g KCl in 36.0 g H₂O is said to be:

Henry's Law constants for aqueous solutions at 25 °C are 8.20 × 10^-7 m/mmHg for N₂ and 1.62 × 10^-6 m/mmHg for O₂.Determine the solubility of oxygen in water under an atmospheric pressure of 760 mmHg,assuming that air is 80% N₂ and 20% O₂.

How much water must be added to 40.0 g of CaCl₂ to produce a solution that is 35.0 wt% CaCl₂?

Arrange the following three aqueous solutions (all 250 cm³ in volume)according to decreasing osmotic pressure at 273 K: 5 g of C₂H₅OH,5 g C₆H₁₂O₆ ,and 5 g C₁₂H₂₂O_11.

Commercial perchloric acid is 70.0% by mass,HClO₄(aq),and has a density of 1.67 g/mL.Calculate the molarity of perchloric acid in the solution.

An aqueous solution contains 64.0 g of ethanol (C₂H₅OH)in 122.0 g of solution.What is the mole fraction of ethanol in the solution?

What molality of pentane is obtained by dissolving 15 g pentane,C₅H₁₂,in 245.0 g hexane,C₆H₁₄?

Solutions are made that contain 0.1 moles of each of the following compounds below in 100 g of H₂O.Choose the compound whose solution will have the lowest freezing point.