Question 1

Identify the compounds that are soluble in both water and hexane.

Accepted Answer

A)  methanol and 1-pentanol 
B)  ethanol and 1-butanol 
C)  1-propanol and 1-butanol 
D)  1-butanol and 1-pentanol 
E)  ethanol and 1-propanol

Question 2

Identify the solute with the highest van't Hoff factor.

Accepted Answer

A)  nonelectrolyte 
B)  K I 
C)  MgSO4 
D)  Ca Cl2 
E)  AlCl3

Question 3

Determine the vapor pressure of a solution at 25°C that contains 85.3 g of naphthalene (C10H8)in 540 g of benzene (C6H6).The vapor pressure of benzene at 25°C is 74.6 torr.

Accepted Answer

A)  74.6 toff. 
B)  68.0 torr. 
C)  54.9 torr. 
D)  7.52 torr. 
E)  22.4 toff.

Question 4

Calculate the molarity of a solution that contains 0.250 moles of K F in enough water to give 0.500 L of solution.

Accepted Answer

A)  0.500 M 
B)  2.00 M 
C)  0.125 M 
D)  8.00 M 
E)  0.750

Question 5

What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane,C6H14?

Accepted Answer

A)  0.0715 
B)  0.0770 
C)  0.133 
D)  0.154

Question 6

How many grams of KBr are required to make 350.mL of a 0.115 M KBr solution?

Accepted Answer

A)  0.338 g 
B)  3.04 g 
C)  4.79 g 
D)  40.3 g

Question 7

Determine the solubility of CO2 in soda water at 25°C if the pressure of CO2 is 5.6 atm.The Henry's law constant for carbon dioxide in water at this temperature is 3.4 × 10-2 M/atm.

Accepted Answer

A)  0.16 M 
B)  0.53 M 
C)  0.61 M 
D)  0.19 M 
E)  0.78 M

Question 8

In an ________ solution,red blood cells ________.

Accepted Answer

A)  isosmotic, have a normal shape 
B)  hyperosmotic, have a normal shape 
C)  hyposmotic, lose water and shrivel 
D)  isosmotic, lose water and shrivel 
E)  isosmotic, swell and may burst

Question 9

To make a 0.500 M solution,one could take 0.500 moles of solute and add

Accepted Answer

A)  1.00 L of solvent. 
B)  1.00 kg of solvent. 
C)  enough solvent to make 1.00 L of solution. 
D)  enough solvent to make 1.00 kg of solution.

Question 10

A solution is prepared by adding 30.00 g of lactose (milk sugar)to 110.0 g of water at 55°C.The partial pressure of water above the solution is ________ torr.The vapor pressure of pure water at 55°C is 118.0 torr.The MW of lactose is 342.3 g/mol.

Accepted Answer

A)  1.670 
B)  94.1 
C)  169.4 
D)  116.3 
E)  92.7

Question 11

Determine the Henry's law constant for ammonia in water at 25°C if an ammonia pressure of 0.022 atm produces a solution with a concentration of 1.3 M.

Accepted Answer

A)  59 M/atm 
B)  0.017 M/atm 
C)  0.029 M/atm 
D)  35 M/atm 
E)  0.038 M/atm

Question 12

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H2O.

Accepted Answer

A)  0.454 m 
B)  0.220 m 
C)  0.818 m 
D)  0.122 m 
E)  0.153 m

Question 13

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11)in 495 g of water.Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

Accepted Answer

A)  4.09 × 10-3 
B)  7.80 × 10-2 
C)  1.28 × 10-3 
D)  7.23 × 10-2 
E)  2.45 × 10-3

Question 14

At 20°C,a 2.32 M aqueous solution of ammonium chloride has a density of  What is the molality of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

Accepted Answer

A)  2.55 
B)  0.0449 
C)  2.32 
D)  0.446 
E)  12.00

Question 15

Identify the gas that is dissolved in carbonated sodas.

Accepted Answer

A)  carbon dioxide 
B)  hydrogen 
C)  neon 
D)  carbon monoxide 
E)  argon

Question 16

At room temperature and 1 atm,the vapor pressure of isobutyl benzoate is 237 mm Hg,and the vapor pressure of vinyl acetate is 72.5 mm Hg.What is the total vapor pressure over a solution composed of these two substances when Xisobutyl benzoate = 0.850.

Accepted Answer

A)  212 mm Hg 
B)  118 mm Hg 
C)  97.2 mm Hg 
D)  146 mm Hg

Question 17

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2)dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.Use 100°C as the boiling point of water.

Accepted Answer

A)  108°C 
B)  92°C 
C)  130°C 
D)  70°C 
E)  8.3°C

Question 18

Choose the situation below that would result in an exothermic ΔHsolution.

Accepted Answer

A)  When  >  
B)  When  is close to  
C)  When  >  
E)  There isn't enough information to determine.

Question 19

A student makes a solution containing 125g of acetonitrile (CH3CN)and 300g of water.What is the mol fraction of acetonitrole?

Accepted Answer

A)  0.845 
B)  0.155 
C)  0.294 
D)  0.706 
E)  0.0453

Question 20

What mass (in g)of NH3 must be dissolved in 475 g of methanol to make a 0.250 m solution?

Accepted Answer

A)  2.02 g 
B)  4.94 g 
C)  1.19 g 
D)  8.42 g 
E)  1.90 g

Exam 14: Solutions

Identify the compounds that are soluble in both water and hexane.

Identify the solute with the highest van't Hoff factor.

Determine the vapor pressure of a solution at 25°C that contains 85.3 g of naphthalene (C₁₀H₈) in 540 g of benzene (C₆H₆) .The vapor pressure of benzene at 25°C is 74.6 torr.

Calculate the molarity of a solution that contains 0.250 moles of K F in enough water to give 0.500 L of solution.

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane,C₆H₁₄?

How many grams of KBr are required to make 350.mL of a 0.115 M KBr solution?

Determine the solubility of CO₂ in soda water at 25°C if the pressure of CO₂ is 5.6 atm.The Henry's law constant for carbon dioxide in water at this temperature is 3.4 × 10^-2 M/atm.

In an solution,red blood cells .

To make a 0.500 M solution,one could take 0.500 moles of solute and add

A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at 55°C.The partial pressure of water above the solution is ________ torr.The vapor pressure of pure water at 55°C is 118.0 torr.The MW of lactose is 342.3 g/mol.

Determine the Henry's law constant for ammonia in water at 25°C if an ammonia pressure of 0.022 atm produces a solution with a concentration of 1.3 M.

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H₂O.

A solution is prepared by dissolving 38.6 g sucrose (C₁₂H₂₂O₁₁) in 495 g of water.Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

At 20°C,a 2.32 M aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

Identify the gas that is dissolved in carbonated sodas.

At room temperature and 1 atm,the vapor pressure of isobutyl benzoate is 237 mm Hg,and the vapor pressure of vinyl acetate is 72.5 mm Hg.What is the total vapor pressure over a solution composed of these two substances when X_isobutylbenzoate = 0.850.

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.Use 100°C as the boiling point of water.

Choose the situation below that would result in an exothermic ΔH_solution.

A student makes a solution containing 125g of acetonitrile (CH₃CN) and 300g of water.What is the mol fraction of acetonitrole?

What mass (in g) of NH₃ must be dissolved in 475 g of methanol to make a 0.250 m solution?

Exam 14: Solutions

Identify the compounds that are soluble in both water and hexane.

Identify the solute with the highest van't Hoff factor.

Determine the vapor pressure of a solution at 25°C that contains 85.3 g of naphthalene (C10H8) in 540 g of benzene (C6H6) .The vapor pressure of benzene at 25°C is 74.6 torr.

Calculate the molarity of a solution that contains 0.250 moles of K F in enough water to give 0.500 L of solution.

What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane,C6H14?

How many grams of KBr are required to make 350.mL of a 0.115 M KBr solution?

Determine the solubility of CO2 in soda water at 25°C if the pressure of CO2 is 5.6 atm.The Henry's law constant for carbon dioxide in water at this temperature is 3.4 × 10-2 M/atm.

In an ________ solution,red blood cells ________.

To make a 0.500 M solution,one could take 0.500 moles of solute and add

A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at 55°C.The partial pressure of water above the solution is ________ torr.The vapor pressure of pure water at 55°C is 118.0 torr.The MW of lactose is 342.3 g/mol.

Determine the Henry's law constant for ammonia in water at 25°C if an ammonia pressure of 0.022 atm produces a solution with a concentration of 1.3 M.

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H2O.

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

At 20°C,a 2.32 M aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol.

Identify the gas that is dissolved in carbonated sodas.

At room temperature and 1 atm,the vapor pressure of isobutyl benzoate is 237 mm Hg,and the vapor pressure of vinyl acetate is 72.5 mm Hg.What is the total vapor pressure over a solution composed of these two substances when Xisobutyl benzoate = 0.850.

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.Use 100°C as the boiling point of water.

Choose the situation below that would result in an exothermic ΔHsolution.

A student makes a solution containing 125g of acetonitrile (CH3CN) and 300g of water.What is the mol fraction of acetonitrole?

What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0.250 m solution?

Determine the vapor pressure of a solution at 25°C that contains 85.3 g of naphthalene (C₁₀H₈) in 540 g of benzene (C₆H₆) .The vapor pressure of benzene at 25°C is 74.6 torr.

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane,C₆H₁₄?

Determine the solubility of CO₂ in soda water at 25°C if the pressure of CO₂ is 5.6 atm.The Henry's law constant for carbon dioxide in water at this temperature is 3.4 × 10^-2 M/atm.

In an solution,red blood cells .

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H₂O.

A solution is prepared by dissolving 38.6 g sucrose (C₁₂H₂₂O₁₁) in 495 g of water.Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

At 20°C,a 2.32 M aqueous solution of ammonium chloride has a density of What is the molality of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

At room temperature and 1 atm,the vapor pressure of isobutyl benzoate is 237 mm Hg,and the vapor pressure of vinyl acetate is 72.5 mm Hg.What is the total vapor pressure over a solution composed of these two substances when X_isobutylbenzoate = 0.850.

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.Use 100°C as the boiling point of water.

Choose the situation below that would result in an exothermic ΔH_solution.

A student makes a solution containing 125g of acetonitrile (CH₃CN) and 300g of water.What is the mol fraction of acetonitrole?

What mass (in g) of NH₃ must be dissolved in 475 g of methanol to make a 0.250 m solution?