Question 1

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

Accepted Answer

A)  47.8%
B)  58.4%
C)  32.4%
D)  The identity of the compound must be known.
E)  none of the aboveF) All of the above
G) B) and D)

Question 2

If the solubility of sodium acetate (Molar mass = 82 g/mol) is 76 grams per 100 grams of water,which of the following solutions would be considered supersaturated?

Accepted Answer

A)  8.5 moles of sodium acetate dissolved in 1 L of water
B)  5.5 moles of sodium acetate dissolved in 500 mL of water
C)  1.8 moles of sodium acetate dissolved in 300 mL of water
D)  1.2 moles of sodium acetate dissolved in 200 mL of water
E)  none of the aboveF) C) and D)
G) B) and C) B

Question 3

Which of the following compounds is a strong electrolyte?

Accepted Answer

A)  C6H12O6
B)  C7H14O5
C)  C4H8O2
D)  NaC2H3O2
E)  all of the aboveF) A) and B)
G) A) and C)

Question 4

How many moles of KOH are contained in 750.mL of 5.00 M KOH solution?

Accepted Answer

A)  6.67 mol
B)  3.75 × Mol
C)  56.1 mol
D)  3.75 mol
E)  none of the aboveF) C) and D)
G) A) and B)

Question 5

A 90.0 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 3.00 liters.The molarity of the final solution is ________.

Accepted Answer

A)  0.500 M
B)  0.750 M
C)  1.00 M
D)  2.25 M
E)  none of the aboveF) A) and C)
G) A) and E)

Question 6

What molarity should the stock solution be if you want to dilute 25.0 mL to 2.00 L and have the final concentration be 0.103 M?

Accepted Answer

A)  0.206 M
B)  8.24 M
C)  4.12 M
D)  0.243 M
E)  none of the aboveF) A) and B)
G) A) and C)

Question 7

What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into 
Of water?

Accepted Answer

A)  84.1%
B)  72.7%
C)  45.7%
D)  54.3%
E)  none of the aboveF) A) and E)
G) B) and C)

Question 8

Tap water contains dissolved nitrogen and oxygen.

Accepted Answer

A) True 
 B)False

Question 9

A stock solution is a more concentrated form than what is typically used in a lab.It often requires further dilution.

Accepted Answer

A) True 
 B)False

Question 10

What are the ion concentrations in a 0.12 M solution of AlCl3?

Accepted Answer

A)  0.36 M Al3+ ions and 0.12 M Cl- ions
B)  0.12 M Al3+ ions and 0.040 M Cl- ions
C)  0.12 M Al3+ ions and 0.36 M Cl- ions
D)  0.040 M Al3+ ions and 0.040 M Cl- ions
E)  none of the aboveF) B) and C)
G) B) and E)

Question 11

How many moles of NaF are in 34.2 grams of a 45.5% by mass NaF solution?

Accepted Answer

A)  0.814
B)  75.2
C)  15.6
D)  0.371
E)  none of the aboveF) A) and D)
G) A) and E)

Question 12

How many mL of 0.112 M Pb(N O3) 2 are needed to completely react with 25.0 mL of 0.105 M KI?
Given: Pb(NO3) 2 (aq) + 2KI(aq) → PbI2 (s) + 2KNO3(aq)

Accepted Answer

A)  11.7
B)  23.4
C)  0.147
D)  5.85
E)  none of the aboveF) A) and B)
G) A) and E)

Question 13

A supersaturated solution is unstable and crystallization usually occurs.

Accepted Answer

A) True 
 B)False

Question 14

The molarity of a solution prepared by dissolving 15.0 grams of NaCl in 1000 mL water is 0.15 M.

Accepted Answer

A) True 
 B)False

Question 15

How many grams of barium sulfate are produced if 25.34 mL of 0.113 M BaCl2 completely react given the reaction:
BaCl2 (aq) + Na2SO4(aq) → BaSO4 (s) + 2NaCl (aq)

Accepted Answer

A)  5.90
B)  26.3
C)  1039
D)  0.668
E)  none of the aboveF) C) and E)
G) A) and B)

Question 16

A solution contains 100.0 g water,10.0 g NaCl,and 15.0 g methanol.What is the weight percent of methanol in the solution?

Accepted Answer

A)  8.00%
B)  10.0%
C)  12.0%
D)  15.0%
E)  none of the aboveF) All of the above
G) A) and E) C

Question 17

When preparing sodium hydroxide solution,it is best to use water that does not contain any dissolved carbon dioxide as it reacts with the sodium hydroxide.Removing the carbon dioxide can be accomplished by:

Accepted Answer

A)  vigorously stirring the solution.
B)  using water fresh out of the purification system.
C)  boiling the water.
D)  Nothing can be done to remove dissolved gases.
E)  none of the aboveF) B) and D)
G) A) and D) C

Question 18

Calculate the molarity of a KCl solution made by dissolving 24.7 g of KCl in a total volume of 500.mL.

Accepted Answer

A)  0.331
B)  0.663
C)  0.166
D)  6.04
E)  none of the aboveF) A) and B)
G) C) and D)

Question 19

Osmosis is the process in which a solvent moves from an area of low solute concentration to an area of high solute concentration.

Accepted Answer

A) True 
 B)False

Question 20

Which solution below contains the highest total quantity of dissolved sodium ions?

Accepted Answer

A)  100.mL of 4.0 M NaCl
B)  75.0 mL of 3.0 M Na2SO4
C)  50.0 mL of 8.0 M NaOH
D)  50.0 mL of 2.0 M Na3PO4
E)  none of the aboveF) All of the above
G) A) and C)

Exam 13: Solutions

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

Correct AnswerverifiedShow Answer

If the solubility of sodium acetate (Molar mass = 82 g/mol) is 76 grams per 100 grams of water,which of the following solutions would be considered supersaturated?

Correct AnswerverifiedB

Which of the following compounds is a strong electrolyte?

Correct AnswerverifiedShow Answer

How many moles of KOH are contained in 750.mL of 5.00 M KOH solution?

Correct AnswerverifiedShow Answer

A 90.0 g sample of NaOH is dissolved in water and the solution is diluted to give a final volume of 3.00 liters.The molarity of the final solution is ________.

Correct AnswerverifiedShow Answer

What molarity should the stock solution be if you want to dilute 25.0 mL to 2.00 L and have the final concentration be 0.103 M?

Correct AnswerverifiedShow Answer

What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into Of water?

Correct AnswerverifiedShow Answer

Tap water contains dissolved nitrogen and oxygen.

Correct AnswerverifiedShow Answer

A stock solution is a more concentrated form than what is typically used in a lab.It often requires further dilution.

Correct AnswerverifiedShow Answer

What are the ion concentrations in a 0.12 M solution of AlCl3?

Correct AnswerverifiedShow Answer

How many moles of NaF are in 34.2 grams of a 45.5% by mass NaF solution?

Correct AnswerverifiedShow Answer

How many mL of 0.112 M Pb(N O3) 2 are needed to completely react with 25.0 mL of 0.105 M KI? Given: Pb(NO3) 2 (aq) + 2KI(aq) → PbI2 (s) + 2KNO3(aq)

Correct AnswerverifiedShow Answer

A supersaturated solution is unstable and crystallization usually occurs.

Correct AnswerverifiedShow Answer

The molarity of a solution prepared by dissolving 15.0 grams of NaCl in 1000 mL water is 0.15 M.

Correct AnswerverifiedShow Answer

How many grams of barium sulfate are produced if 25.34 mL of 0.113 M BaCl2 completely react given the reaction: BaCl2 (aq) + Na2SO4(aq) → BaSO4 (s) + 2NaCl (aq)

Correct AnswerverifiedShow Answer

A solution contains 100.0 g water,10.0 g NaCl,and 15.0 g methanol.What is the weight percent of methanol in the solution?

Correct AnswerverifiedC

When preparing sodium hydroxide solution,it is best to use water that does not contain any dissolved carbon dioxide as it reacts with the sodium hydroxide.Removing the carbon dioxide can be accomplished by:

Correct AnswerverifiedC

Calculate the molarity of a KCl solution made by dissolving 24.7 g of KCl in a total volume of 500.mL.

Correct AnswerverifiedShow Answer

Osmosis is the process in which a solvent moves from an area of low solute concentration to an area of high solute concentration.

Correct AnswerverifiedShow Answer

Which solution below contains the highest total quantity of dissolved sodium ions?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What are the ion concentrations in a 0.12 M solution of AlCl₃?

Correct Answer
verified

Correct Answer
verified

How many mL of 0.112 M Pb(N O₃) ₂ are needed to completely react with 25.0 mL of 0.105 M KI? Given: Pb(NO₃) ₂ (aq) + 2KI(aq) → PbI₂ (s) + 2KNO₃(aq)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many grams of barium sulfate are produced if 25.34 mL of 0.113 M BaCl₂ completely react given the reaction: BaCl₂ (aq) + Na₂SO₄(aq) → BaSO₄ (s) + 2NaCl (aq)

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified