Question 1

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25 °\degree° C. What is the mole fraction of potassium permanganate in this solution?

Accepted Answer

A)   0.0080
B)   0.0086
C)   0.066
D)   0.45
E)   0.48 F) All of the above
G) A) and B)

Question 2

If the shell of a raw egg is carefully dissolved away, and the egg in its flexible membrane is then placed in distilled water, the egg's volume will expand. Explain.

Accepted Answer

The osmotic pressure of the solution ins...

Question 3

Two aqueous are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?

Accepted Answer

A)   The Na2CO3 solution has a higher osmotic pressure and higher vapor pressure than the LiCl solution.
B)   The Na2CO3 solution has a higher osmotic pressure and higher boiling point than the LiCl solution.
C)   The Na2CO3 solution has a lower osmotic pressure and lower vapor pressure than the LiCI solution.
D)   The Na2CO3 solution has a lower osmotic pressure and higher boiling point than the LiCl solution.
E)   None of these choices is correct.F) A) and B)
G) None of the above

Question 4

A solution of sucrose (sugar)  in water is in equilibrium with solid sucrose. If more solid sucrose is now added, with stirring,

Accepted Answer

A)   the concentration of the solution will increase.
B)   the concentration of the solution will decrease.
C)   the concentration of the solution will remain the same.
D)   the volume of solution will increase.
E)   a supersaturated solution will be produced.F) C) and D)
G) B) and C)

Question 5

Classify the following as either solutions or colloids. If a colloid, name the type of colloid and identify both the dispersed and the dispersing phases.
a. glucose in water
b. smoke in air
c. carbon dioxide in air
d. milk

Accepted Answer

a. solution
b. coll...

Question 6

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25 °\degree° C?

Accepted Answer

A)   0.012 atm
B)   0.62 atm
C)   6.8 atm
D)   7.3 atm
E)   >10. atm F) A) and B)
G) A) and C)

Question 7

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

Accepted Answer

The pressure inside the flask will initi...

Question 8

Cinnamaldehyde (? = 132.15 g/mol)  is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7 °\degree° C? Kb = 1.22 °\degree° C/m, boiling point of pure ethanol = 78.5 °\degree° C

Accepted Answer

A)   62.4 g
B)   67.8 g
C)   76.2 g
D)   78.5 g
E)   79.6 g F) None of the above
G) A) and D)

Question 9

Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (? = 46.07 g/mol) . P °\degree° ethanol = 50.0 torr at 25 °\degree° C.

Accepted Answer

A)   1.8 torr
B)   11 torr
C)   15 torr
D)   40 torr
E)   48 torr F) A) and E)
G) A) and C)

Question 10

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Accepted Answer

A)   0.1 M K2SO4
B)   0.1 M CaCl2
C)   3.0 M LiF
D)   0.1 M MgSO4
E)   0.1 M NaClF) C) and D)
G) B) and C)

Question 11

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr2 in 375.0 g of water.

Accepted Answer

A)   0.03035 m
B)   0.01600 m
C)   0.1210 m
D)   0.4446 m
E)   None of these choices is correct.F) C) and E)
G) All of the above

Question 12

The mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL. Calculate the molarity of the solution.

Accepted Answer

A)   0.0194 M
B)   0.981 M
C)   1.05 M
D)   1.96 M
E)   19.4 MF) B) and E)
G) A) and D)

Question 13

Copper(II)  bromide is used as a wood preservative. What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution?

Accepted Answer

A)   134 g
B)   209 g
C)   372 g
D)   938 g
E)   > 1 kgF) C) and D)
G) B) and C)

Question 14

The shape of a protein molecule is determined completely by

Accepted Answer

A)   hydrogen bonding.
B)   ion-dipole attractions.
C)   dispersion forces.
D)   disulfide bridges.
E)   the sequence of amino acids in the chain.F) C) and E)
G) C) and D)

Question 15

Carbon tetrachloride, once widely used in fire extinguishers and as a dry cleaning fluid, has been found to cause liver damage to those exposed to its vapors over long periods of time. What is the boiling point of a solution prepared by dissolving 375 g of sulfur (S8, ? = 256.5 g/mol)  in 1250 g of CCl4? Kb = 5.05 °\degree° C/m, boiling point of pure CCl4 = 76.7 °\degree° C

Accepted Answer

A)   70.8 °\degree° C
B)   75.2 °\degree° C
C)   78.2 °\degree° C
D)   82.6 °\degree° C
E)   >85 °\degree° C F) A) and D)
G) B) and C)

Question 16

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Accepted Answer

A)   0.1 M NaI
B)   0.2 M CuSO4
C)   0.5 M KBr
D)   2.0 M CuCl2
E)   2.0 M CsClF) A) and D)
G) A) and E)

Question 18

Under physiological conditions, amino acids in solution carry

Accepted Answer

A)   no electrical charges.
B)   a net positive charge, due to an -NH3+ group or groups.
C)   a net negative charge, due to a -COO¯ group or groups.
D)   both -NH2 and -COOH groups.
E)   both -NH3+ and -COO¯ groups.F) None of the above
G) All of the above

Exam 13: The Properties of Mixtures: Solutions and Colloids

Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (? = 46.07 g/mol) . P $\degree$ _ethanol = 50.0 torr at 25 $\degree$ C.

Correct Answer
verified

The mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL. Calculate the molarity of the solution.

Correct Answer
verified

If the shell of a raw egg is carefully dissolved away, and the egg in its flexible membrane is then placed in distilled water, the egg's volume will expand. Explain.

Correct Answer
verified
The osmotic pressure of the solution ins...
View Answer

Classify the following as either solutions or colloids. If a colloid, name the type of colloid and identify both the dispersed and the dispersing phases. a. glucose in water b. smoke in air c. carbon dioxide in air d. milk

Correct Answer
verified
a. solution
b. coll...
View Answer

Correct Answer
verified

Copper(II) bromide is used as a wood preservative. What mass of CuBr₂ is needed to prepare 750.0 mL of a 1.25 M solution?

Correct Answer
verified

The shape of a protein molecule is determined completely by

Correct Answer
verified

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct Answer
verified

Under physiological conditions, amino acids in solution carry

Correct Answer
verified

A solution of sucrose (sugar) in water is in equilibrium with solid sucrose. If more solid sucrose is now added, with stirring,

Correct Answer
verified

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25 $\degree$ C. What is the mole fraction of potassium permanganate in this solution?

Correct Answer
verified

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25 $\degree$ C?

Correct Answer
verified

Two aqueous are prepared: 1.00 m Na₂CO₃ and 1.00 m LiCl. Which of the following statements is true?

Correct Answer
verified

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Correct Answer
verified

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

Correct Answer
verified
The pressure inside the flask will initi...
View Answer

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water.

Correct Answer
verified

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Correct Answer
verified

Cinnamaldehyde (? = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7 $\degree$ C? K_b = 1.22 $\degree$ C/m, boiling point of pure ethanol = 78.5 $\degree$ C

Correct Answer
verified

Exam 13: The Properties of Mixtures: Solutions and Colloids

Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (? = 46.07 g/mol) . P °\degree° ethanol = 50.0 torr at 25 °\degree° C.

Correct AnswerverifiedShow Answer

The mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL. Calculate the molarity of the solution.

Correct AnswerverifiedShow Answer

If the shell of a raw egg is carefully dissolved away, and the egg in its flexible membrane is then placed in distilled water, the egg's volume will expand. Explain.

Correct AnswerverifiedThe osmotic pressure of the solution ins...View AnswerShow Answer

Classify the following as either solutions or colloids. If a colloid, name the type of colloid and identify both the dispersed and the dispersing phases. a. glucose in water b. smoke in air c. carbon dioxide in air d. milk

Correct Answerverifieda. solution b. coll...View AnswerShow Answer

Correct AnswerverifiedShow Answer

Copper(II) bromide is used as a wood preservative. What mass of CuBr2 is needed to prepare 750.0 mL of a 1.25 M solution?

Correct AnswerverifiedShow Answer

The shape of a protein molecule is determined completely by

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct AnswerverifiedShow Answer

Under physiological conditions, amino acids in solution carry

Correct AnswerverifiedShow Answer

A solution of sucrose (sugar) in water is in equilibrium with solid sucrose. If more solid sucrose is now added, with stirring,

Correct AnswerverifiedShow Answer

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25 °\degree° C. What is the mole fraction of potassium permanganate in this solution?

Correct AnswerverifiedShow Answer

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25 °\degree° C?

Correct AnswerverifiedShow Answer

Two aqueous are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?

Correct AnswerverifiedShow Answer

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Correct AnswerverifiedShow Answer

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

Correct AnswerverifiedThe pressure inside the flask will initi...View AnswerShow Answer

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr2 in 375.0 g of water.

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Correct AnswerverifiedShow Answer

Cinnamaldehyde (? = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7 °\degree° C? Kb = 1.22 °\degree° C/m, boiling point of pure ethanol = 78.5 °\degree° C

Correct AnswerverifiedShow Answer

Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (? = 46.07 g/mol) . P $\degree$ _ethanol = 50.0 torr at 25 $\degree$ C.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The osmotic pressure of the solution ins...
View Answer

Correct Answer
verified
a. solution
b. coll...
View Answer

Correct Answer
verified

Copper(II) bromide is used as a wood preservative. What mass of CuBr₂ is needed to prepare 750.0 mL of a 1.25 M solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25 $\degree$ C. What is the mole fraction of potassium permanganate in this solution?

Correct Answer
verified

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25 $\degree$ C?

Correct Answer
verified

Two aqueous are prepared: 1.00 m Na₂CO₃ and 1.00 m LiCl. Which of the following statements is true?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The pressure inside the flask will initi...
View Answer

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water.

Correct Answer
verified

Correct Answer
verified

Cinnamaldehyde (? = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7 $\degree$ C? K_b = 1.22 $\degree$ C/m, boiling point of pure ethanol = 78.5 $\degree$ C

Correct Answer
verified