Question 1

Which of the following factors cause colloidal particles to remain in solution without settling?

Accepted Answer

A)  Colloidal particles acquire a charge on their large surface areas. 
B)  Colloidal particles have large solvation layers. 
C)  both a and b 
D)  neither a nor b 
A)  Colloidal particles acquire a charge on their large surface areas. 
B)  Colloidal particles have large solvation layers. 
C)  both a and b 
D)  neither a nor b

Question 2

Which of the following is associated with the desalinization of water?

Accepted Answer

A)  crenation 
B)  hemolysis 
C)  reverse osmosis 
D)  none of these 
A)  crenation 
B)  hemolysis 
C)  reverse osmosis 
D)  none of these

Question 3

When alcohol is dissolved in water which is the solute?

Accepted Answer

A)  the alcohol 
B)  the water 
C)  the compound present in larger amount 
D)  the compound present in smaller amount 
A)  the alcohol 
B)  the water 
C)  the compound present in larger amount 
D)  the compound present in smaller amount

Question 4

Which of the following concentration units will not change if the solution is heated?

Accepted Answer

A)  %(w/w) 
B)  %(w/v) 
C)  both a and b 
D)  neither a nor b 
A)  %(w/w) 
B)  %(w/v) 
C)  both a and b 
D)  neither a nor b

Question 5

Suppose you prepare a solution by mixing a known volume of ethanol (density = 0.789 g/mL) with a known volume of water (density = 1.00 g/mL). Which of the following can be determined from the information given?

Accepted Answer

A)  %(w/w) 
B)  %(w/v) 
C)  Both a and b can be determined. 
D)  Neither a nor b can be determined. 
A)  %(w/w) 
B)  %(w/v) 
C)  Both a and b can be determined. 
D)  Neither a nor b can be determined.

Question 6

Which of the following is true when comparing a dialysis membrane with an osmotic semipermeable membrane?

Accepted Answer

A)  Both membranes allow solvent particles to pass through. 
B)  The osmotic membrane has larger openings. 
C)  both a and b 
D)  neither a nor b 
A)  Both membranes allow solvent particles to pass through. 
B)  The osmotic membrane has larger openings. 
C)  both a and b 
D)  neither a nor b

Question 7

Which of the following solutions will have the higher electrical conductivity?

Accepted Answer

A)  0.1 M NaCl 
B)  0.2 M NaCl 
C)  Both a and b have the same conductivity. 
D)  Neither conducts electricity. 
A)  0.1 M NaCl 
B)  0.2 M NaCl 
C)  Both a and b have the same conductivity. 
D)  Neither conducts electricity.

Question 8

Which of the following pairs of liquids are miscible in all proportions?

Accepted Answer

A)  ethanol and water 
B)  ethanol and oil 
C)  gasoline and water 
D)  none of these 
A)  ethanol and water 
B)  ethanol and oil 
C)  gasoline and water 
D)  none of these

Question 9

A chemist has a sample which is known to be a solution. Which of the following might be used to separate the components of the solution?

Accepted Answer

A)  distillation 
B)  filtration 
C)  either a or b 
D)  neither a nor b 
A)  distillation 
B)  filtration 
C)  either a or b 
D)  neither a nor b

Question 10

A student is preparing a sugar water solution to make rock candy. When the student adds some sugar to the solution a large amount of sugar crystallizes. Which kind of solution does the student have?

Accepted Answer

A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell. 
A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell.

Question 11

Which of the following will have the highest electrical conductivity?

Accepted Answer

A)  0.1 M NaCl 
B)  0.2 M NaCl 
C)  0.3 M NaC2H3O2 
D)  0.4 M NaC2H3O2 
A)  0.1 M NaCl 
B)  0.2 M NaCl 
C)  0.3 M NaC2H3O2 
D)  0.4 M NaC2H3O2

Question 12

Which of the following is a weak electrolyte?

Accepted Answer

A)  CO2 
B)  CH3COOH 
C)  both a and b 
D)  neither of them 
A)  CO2 
B)  CH3COOH 
C)  both a and b 
D)  neither of them

Question 13

Assuming that the volumes are additive, what volume of water must be added to 35.0 mL of 12.0 M HCl to make a solution which is 3.00 M?

Accepted Answer

A)  70.0 mL 
B)  87.5 mL 
C)  105 mL 
D)  140 mL 
A)  70.0 mL 
B)  87.5 mL 
C)  105 mL 
D)  140 mL

Question 14

Which of the following cannot serve as a solute in a solution?

Accepted Answer

A)  a gas 
B)  a liquid 
C)  a solid 
D)  None, all can serve as solutes. 
A)  a gas 
B)  a liquid 
C)  a solid 
D)  None, all can serve as solutes.

Question 15

Which of the following is an example of a colloid in which a gas is dispersed in a liquid?

Accepted Answer

A)  butter 
B)  marshmallows 
C)  mayonnaise 
D)  whipped cream 
A)  butter 
B)  marshmallows 
C)  mayonnaise 
D)  whipped cream

Question 16

Which laboratory equipment is needed to prepare solutions of known %(w/w)?

Accepted Answer

A)  a balance 
B)  a volumetric flask 
C)  both a and b 
D)  neither a nor b 
A)  a balance 
B)  a volumetric flask 
C)  both a and b 
D)  neither a nor b

Question 17

Which of the following is true of electrolytes?

Accepted Answer

A)  All electrolytes have water as a solvent. 
B)  All electrolytes contain cations and anions. 
C)  both a and b 
D)  neither a nor b 
A)  All electrolytes have water as a solvent. 
B)  All electrolytes contain cations and anions. 
C)  both a and b 
D)  neither a nor b

Question 18

A certain wine contains 0.0100 M NaHSO3 as a preservative. What mass of NaHSO3 is in a 750 mL bottle of this wine?

Accepted Answer

A)  0.39 g 
B)  0.70 g 
C)  0.78 g 
D)  1.5 g 
A)  0.39 g 
B)  0.70 g 
C)  0.78 g 
D)  1.5 g

Question 19

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 1000. grams of water? What is the boiling point of this solution? [The boiling point elevation constant for water is 0.52°C/mole solute in 1000g of water]

Accepted Answer

A)  100.26°C 
B)  100.52°C 
C)  100.78°C 
D)  101.04°C 
A)  100.26°C 
B)  100.52°C 
C)  100.78°C 
D)  101.04°C

Question 20

Which of the following aqueous solutions of Na2SO4 is isotonic with a 0.15 M NaCl solution?

Accepted Answer

A)  0.05 M 
B)  0.10 M 
C)  0.15 M 
D)  none of these 
A)  0.05 M 
B)  0.10 M 
C)  0.15 M 
D)  none of these

Exam 6: Solutions and Colloids

Which of the following factors cause colloidal particles to remain in solution without settling?

Which of the following is associated with the desalinization of water?

When alcohol is dissolved in water which is the solute?

Which of the following concentration units will not change if the solution is heated?

Suppose you prepare a solution by mixing a known volume of ethanol (density = 0.789 g/mL) with a known volume of water (density = 1.00 g/mL). Which of the following can be determined from the information given?

Which of the following is true when comparing a dialysis membrane with an osmotic semipermeable membrane?

Which of the following solutions will have the higher electrical conductivity?

Which of the following pairs of liquids are miscible in all proportions?

A chemist has a sample which is known to be a solution. Which of the following might be used to separate the components of the solution?

A student is preparing a sugar water solution to make rock candy. When the student adds some sugar to the solution a large amount of sugar crystallizes. Which kind of solution does the student have?

Which of the following will have the highest electrical conductivity?

Which of the following is a weak electrolyte?

Assuming that the volumes are additive, what volume of water must be added to 35.0 mL of 12.0 M HCl to make a solution which is 3.00 M?

Which of the following cannot serve as a solute in a solution?

Which of the following is an example of a colloid in which a gas is dispersed in a liquid?

Which laboratory equipment is needed to prepare solutions of known %(w/w)?

Which of the following is true of electrolytes?

A certain wine contains 0.0100 M NaHSO3 as a preservative. What mass of NaHSO3 is in a 750 mL bottle of this wine?

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 1000. grams of water? What is the boiling point of this solution? [The boiling point elevation constant for water is 0.52°C/mole solute in 1000g of water]

Which of the following aqueous solutions of Na2SO4 is isotonic with a 0.15 M NaCl solution?

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A certain wine contains 0.0100 M NaHSO₃ as a preservative. What mass of NaHSO₃ is in a 750 mL bottle of this wine?

A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl₂ in 1000. grams of water? What is the boiling point of this solution? [The boiling point elevation constant for water is 0.52°C/mole solute in 1000g of water]

Which of the following aqueous solutions of Na₂SO₄ is isotonic with a 0.15 M NaCl solution?