Question 1

In how many grams of water should 25.31 g of potassium nitrate (KNO3)be dissolved to prepare a 0.1982 m solution?

Accepted Answer

A) 250.0 g 
B) 792.0 g 
C) 1,000. g 
D) 1,263 g 
E) 7,917 g 
A) 250.0 g 
B) 792.0 g 
C) 1,000. g 
D) 1,263 g 
E) 7,917 g

Question 2

Dissolving a solute such as KOH in a solvent such as water results in

Accepted Answer

A) an increase in the melting point of the liquid. 
B) a decrease in the boiling point of the liquid. 
C) a decrease in the vapor pressure of the liquid. 
D) no change in the boiling point of the liquid. 
A) an increase in the melting point of the liquid. 
B) a decrease in the boiling point of the liquid. 
C) a decrease in the vapor pressure of the liquid. 
D) no change in the boiling point of the liquid.

Question 3

The solubility of a solid always increases with increasing solvent temperature.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) 0.18 m KCl 
B) 0.15 m Na2SO4 
C) 0.12 m Ca(NO3)2 
D) pure water 
E) 0.20 m C2H6O2 (ethylene glycol) 
A) 0.18 m KCl 
B) 0.15 m Na2SO4 
C) 0.12 m Ca(NO3)2 
D) pure water 
E) 0.20 m C2H6O2 (ethylene glycol)

Question 5

A saturated solution

Accepted Answer

A) contains more solute than solvent. 
B) contains more solvent than solute. 
C) contains equal moles of solute and solvent. 
D) contains the maximum amount of solute that will dissolve in that solvent at that temperature. 
E) contains a solvent with only sigma bonds and no pi bonds (i.e. only single bonds, with no double or triple bonds). 
A) contains more solute than solvent. 
B) contains more solvent than solute. 
C) contains equal moles of solute and solvent. 
D) contains the maximum amount of solute that will dissolve in that solvent at that temperature. 
E) contains a solvent with only sigma bonds and no pi bonds (i.e. only single bonds, with no double or triple bonds).

Question 6

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution?

Accepted Answer

A) 769 g 
B) 36.2 g 
C) 100. g 
D) 0.157 g 
E) 157 g 
A) 769 g 
B) 36.2 g 
C) 100. g 
D) 0.157 g 
E) 157 g

Question 7

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.144°C. Pure benzene freezes at 5.444°C and has a Kf of 5.12°C/m. What is the molar mass of thyroxine?

Accepted Answer

Question 8

Consider a solution made from a nonvolatile solute and a volatile solvent. Which statement is true?

Accepted Answer

A) The vapor pressure of the solution is always greater than the vapor pressure of the pure solvent. 
B) The boiling point of the solution is always greater than the boiling point of the pure solvent. 
C) The freezing point of the solution is always greater than the freezing point of the pure solvent. 
A) The vapor pressure of the solution is always greater than the vapor pressure of the pure solvent. 
B) The boiling point of the solution is always greater than the boiling point of the pure solvent. 
C) The freezing point of the solution is always greater than the freezing point of the pure solvent.

Question 9

How many liters of ethylene glycol antifreeze (C2H6O2)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, Kf = 1.86°C/m.)

Accepted Answer

In how many grams of water should 25.31 g of potassium nitrate (KNO₃)be dissolved to prepare a 0.1982 m solution?

Dissolving a solute such as KOH in a solvent such as water results in

The solubility of a solid always increases with increasing solvent temperature.

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

A saturated solution

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH₄NO₃ in order to prepare a 0.452 m solution?

Consider a solution made from a nonvolatile solute and a volatile solvent. Which statement is true?

How many liters of ethylene glycol antifreeze (C₂H₆O₂)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, K_f = 1.86°C/m.)

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Exam 13: Physical Properties of Solutions

In how many grams of water should 25.31 g of potassium nitrate (KNO3)be dissolved to prepare a 0.1982 m solution?

Dissolving a solute such as KOH in a solvent such as water results in

The solubility of a solid always increases with increasing solvent temperature.

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

A saturated solution

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution?

Consider a solution made from a nonvolatile solute and a volatile solvent. Which statement is true?

How many liters of ethylene glycol antifreeze (C2H6O2)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, Kf = 1.86°C/m.)

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

In how many grams of water should 25.31 g of potassium nitrate (KNO₃)be dissolved to prepare a 0.1982 m solution?

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH₄NO₃ in order to prepare a 0.452 m solution?

How many liters of ethylene glycol antifreeze (C₂H₆O₂)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, K_f = 1.86°C/m.)