Question 1

What mass of a 0.66 m ammonium nitrate (80.04 g/mol) solution will contain 0.15 mol of solute?

Accepted Answer

A)  227 g 
B)  239 g 
C)  440 g 
D)  493 g 
E)  4,453 g 
A)  227 g 
B)  239 g 
C)  440 g 
D)  493 g 
E)  4,453 g

Question 2

Rank the following ionic compounds in order of increasing lattice energy (largest lattice energy is the most negative): MgF2, MgCl2, MgBr2, and MgI2.

Accepted Answer

All of these consist of 2+ cat

Question 3

Define the terms enthalpy of solution, enthalpy of hydration, and lattice energy.

Accepted Answer

Enthalpy of solution is the energy absor

Question 4

Click, Clack, and Jim have identical icy driveways. Click buys 10 lb of NaCl, Clack buys 10 lb of CaCl2, and Jim buys 10 lb of MgCl2. They spread these salts on their driveways. Which driveway will deice more effectively? (Assume that ideal dissociation of the salts occurs, and that colligative properties are the only consideration.)

Accepted Answer

A)  Click's driveway will deice best. 
B)  Clack's driveway will deice best. 
C)  Jim's driveway will deice best. 
D)  The three driveways will deice to the same extent. 
E)  Clack and Jim's driveways will deice better than Click's. 
A)  Click's driveway will deice best. 
B)  Clack's driveway will deice best. 
C)  Jim's driveway will deice best. 
D)  The three driveways will deice to the same extent. 
E)  Clack and Jim's driveways will deice better than Click's.

Question 5

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299°C. What is the actual van 't Hoff factor for this salt at this concentration compared to the ideal one of 2?
Kf (water) = 1.86°C/m

Accepted Answer

A)  1.88 
B)  1.98 
C)  1.93 
D)  1.83 
E)  1.94 
A)  1.88 
B)  1.98 
C)  1.93 
D)  1.83 
E)  1.94

Question 6

Which of the following must be true if the dissolution of an ionic solid in water is endothermic?

Accepted Answer

A)  The change in enthalpy for this process is negative. 
B)  The process releases energy. 
C)  The hydration energy exceeds the lattice energy. 
D)  The ions have charges greater than 1 unit. 
E)  The solubility will increase with increasing temperature. 
A)  The change in enthalpy for this process is negative. 
B)  The process releases energy. 
C)  The hydration energy exceeds the lattice energy. 
D)  The ions have charges greater than 1 unit. 
E)  The solubility will increase with increasing temperature.

Question 7

A medical company separates methanol (CH3OH)) and ethanol (CH3CH2OH) by distillation. In one run, the starting solution was 25% methanol and 75% ethanol by mass at 25°C. In the liquid, the mole ratio of methanol to ethanol was ________, and in the vapor it was ________. The vapor pressures for methanol and ethanol at this temperature are 92 torr and 45 torr, respectively.

Accepted Answer

A)  0.48; 2.0 
B)  2.0; 0.48 
C)  0.33; 2.0 
D)  0.48; 0.33 
E)  2.3; 0.55 
A)  0.48; 2.0 
B)  2.0; 0.48 
C)  0.33; 2.0 
D)  0.48; 0.33 
E)  2.3; 0.55

Question 8

The molality of a solution is defined as ________

Accepted Answer

A)  moles of solute per liter of solution. 
B)  grams of solute per liter of solution. 
C)  moles of solute per kilogram of solution. 
D)  moles of solute per kilogram of solvent. 
E)  grams of solute per kilogram of solvent. 
A)  moles of solute per liter of solution. 
B)  grams of solute per liter of solution. 
C)  moles of solute per kilogram of solution. 
D)  moles of solute per kilogram of solvent. 
E)  grams of solute per kilogram of solvent.

Question 9

Eugenol is a nonelectrolyte that contributes to the flavor of spices such as clove, nutmeg, cinnamon, and basil. A 328 mg sample of eugenol was dissolved in 10.0 g of chloroform
(Kb = 3.63°C/m), increasing the boiling point of the chloroform by 0.726°C. What is the molar
Mass of eugenol?

Accepted Answer

A)  164 g/mol 
B)  328 g/mol 
C)  363 g/mol 
D)  182 g/mol 
E)  82 g/mol 
A)  164 g/mol 
B)  328 g/mol 
C)  363 g/mol 
D)  182 g/mol 
E)  82 g/mol

Question 10

Which listing of ionic compounds is in order of increasing melting point?

Accepted Answer

A)  NaF 2 3 
B)  MgF2 3 
C)  AlF3 2 3 2 
E)  NaF 3 2 
A)  NaF 2 3 
B)  MgF2 3 
C)  AlF3 2 3 2 
E)  NaF 3 2

What mass of a 0.66 m ammonium nitrate (80.04 g/mol) solution will contain 0.15 mol of solute?

Rank the following ionic compounds in order of increasing lattice energy (largest lattice energy is the most negative): MgF₂, MgCl₂, MgBr₂, and MgI₂.

Define the terms enthalpy of solution, enthalpy of hydration, and lattice energy.

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299°C. What is the actual van 't Hoff factor for this salt at this concentration compared to the ideal one of 2? K_f(water) = 1.86°C/m

Which of the following must be true if the dissolution of an ionic solid in water is endothermic?

The molality of a solution is defined as ________

Eugenol is a nonelectrolyte that contributes to the flavor of spices such as clove, nutmeg, cinnamon, and basil. A 328 mg sample of eugenol was dissolved in 10.0 g of chloroform (K_b = 3.63°C/m), increasing the boiling point of the chloroform by 0.726°C. What is the molar Mass of eugenol?

Which listing of ionic compounds is in order of increasing melting point?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solids: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

Exam 11: Solutions: Properties and Behavior

What mass of a 0.66 m ammonium nitrate (80.04 g/mol) solution will contain 0.15 mol of solute?

Rank the following ionic compounds in order of increasing lattice energy (largest lattice energy is the most negative): MgF2, MgCl2, MgBr2, and MgI2.

Define the terms enthalpy of solution, enthalpy of hydration, and lattice energy.

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299°C. What is the actual van 't Hoff factor for this salt at this concentration compared to the ideal one of 2? Kf (water) = 1.86°C/m

Which of the following must be true if the dissolution of an ionic solid in water is endothermic?

The molality of a solution is defined as ________

Eugenol is a nonelectrolyte that contributes to the flavor of spices such as clove, nutmeg, cinnamon, and basil. A 328 mg sample of eugenol was dissolved in 10.0 g of chloroform (Kb = 3.63°C/m), increasing the boiling point of the chloroform by 0.726°C. What is the molar Mass of eugenol?

Which listing of ionic compounds is in order of increasing melting point?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: the Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solids: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

Rank the following ionic compounds in order of increasing lattice energy (largest lattice energy is the most negative): MgF₂, MgCl₂, MgBr₂, and MgI₂.

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299°C. What is the actual van 't Hoff factor for this salt at this concentration compared to the ideal one of 2? K_f(water) = 1.86°C/m

Eugenol is a nonelectrolyte that contributes to the flavor of spices such as clove, nutmeg, cinnamon, and basil. A 328 mg sample of eugenol was dissolved in 10.0 g of chloroform (K_b = 3.63°C/m), increasing the boiling point of the chloroform by 0.726°C. What is the molar Mass of eugenol?