Question 1

Which substance is acting as a Brønsted acid in the following reaction
HSO4- + NH4+ $\rarr$ H2SO4 + NH3

Accepted Answer

A)  HSO4- 
B)  NH4+ 
C)  H2SO4 
D)  NH3 
E)  Both HSO4- and NH4+ 
A)  HSO4- 
B)  NH4+ 
C)  H2SO4 
D)  NH3 
E)  Both HSO4- and NH4+

Question 2

The solubility of Ba(NO3)2 is 130.5 grams per liter at 0$\circ$C. How many moles of dissolved salt are present in 4.0 liters of a saturated solution of Ba(NO3)2 at 0ºC

Accepted Answer

A)  1.0 moles 
B)  2.0 moles 
C)  3.0 moles 
D)  4.0 moles 
E)  None of the above 
A)  1.0 moles 
B)  2.0 moles 
C)  3.0 moles 
D)  4.0 moles 
E)  None of the above

Question 3

The common constituent in all acid solutions is

Accepted Answer

A)  H2 
B)  H+ 
C)  OH- 
D)  H2SO4 
E)  Cl- 
A)  H2 
B)  H+ 
C)  OH- 
D)  H2SO4 
E)  Cl-

Question 4

What element is oxidized in the following chemical reaction
H2SO4 + Cd(OH)2 $\rarr$ 2H2O + CdSO4

Accepted Answer

A)  H 
B)  S 
C)  O 
D)  Cd 
E)  this is not a redox reaction 
A)  H 
B)  S 
C)  O 
D)  Cd 
E)  this is not a redox reaction

Question 5

The highest possible oxidation number of nitrogen is

Accepted Answer

A)  +8. 
B)  +5. 
C)  +3. 
D)  +1. 
E)  -3. 
A)  +8. 
B)  +5. 
C)  +3. 
D)  +1. 
E)  -3.

Question 6

A 350. mL sample of 0.276M HNO3 is partially neutralized by 125 mL of 0.0120M Ca(OH)2. Find the concentration of nitric acid in the resulting solution.

Accepted Answer

A)  0.210 M 
B)  0.00632 M 
C)  0.203 M 
D)  0.0240 M 
E)  0.197 M 
A)  0.210 M 
B)  0.00632 M 
C)  0.203 M 
D)  0.0240 M 
E)  0.197 M

Question 7

The oxidation number of Mn in KMnO4 is

Accepted Answer

A)  +8. 
B)  +7. 
C)  +5. 
D)  -7. 
E)  -8. 
A)  +8. 
B)  +7. 
C)  +5. 
D)  -7. 
E)  -8.

Question 8

Which of the following compounds is a weak electrolyte

Accepted Answer

A)  HCl 
B)  NH3 
C)  C6H12O6 (glucose) 
D)  N2 
E)  KCl 
A)  HCl 
B)  NH3 
C)  C6H12O6 (glucose) 
D)  N2 
E)  KCl

Question 9

The oxidation number of N in NaNO3 is

Accepted Answer

A)  +6. 
B)  +5. 
C)  +3. 
D)  -3. 
E)  None of the above. 
A)  +6. 
B)  +5. 
C)  +3. 
D)  -3. 
E)  None of the above.

Question 10

Identify the major ions present in an aqueous HNO3 solution.

Accepted Answer

A)  HN+, O2- 
B)  OH-, NO3- 
C)  OH-, NO 
D)  H+, N3-, O2- 
E)  H+, NO3- 
A)  HN+, O2- 
B)  OH-, NO3- 
C)  OH-, NO 
D)  H+, N3-, O2- 
E)  H+, NO3-

Question 11

When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution

Accepted Answer

A)  3.10 * 10-4 M 
B)  1.55 * 10-4 M 
C)  6.20 * 10-3 M 
D)  3.11 * 10-3 M 
E)  1.55 * 10-3 M 
A)  3.10 * 10-4 M 
B)  1.55 * 10-4 M 
C)  6.20 * 10-3 M 
D)  3.11 * 10-3 M 
E)  1.55 * 10-3 M

Question 12

H2SO4 is reduced in this process. (Batteries in our cars generate electricity by the following chemical reaction.)
Pb + PbO2 + 2H2SO4 $\rarr$ 2PbSO4 + 2H2O

Accepted Answer

A) True 
 B)False

Question 13

The following reaction is an acid-base neutralization reaction.
H2SO4(aq) + CaBr2(aq) $\rarr$ CaSO4(s) + 2HBr(g)

Accepted Answer

A) True 
 B)False

Question 14

Which of the following will occur when solutions of CuSO4(aq) and BaCl2(aq) are mixed

Accepted Answer

A)  A precipitate of CuCl2 will form; Ba2+ and SO42- are spectator ions. 
B)  A precipitate of CuSO4 will form; Ba2+ and Cl- are spectator ions. 
C)  A precipitate of BaSO4 will form; Cu2+ and Cl- are spectator ions. 
D)  A precipitate of BaCl2 will form; Cu2+ and SO42- are spectator ions. 
E)  No precipitate will form. 
A)  A precipitate of CuCl2 will form; Ba2+ and SO42- are spectator ions. 
B)  A precipitate of CuSO4 will form; Ba2+ and Cl- are spectator ions. 
C)  A precipitate of BaSO4 will form; Cu2+ and Cl- are spectator ions. 
D)  A precipitate of BaCl2 will form; Cu2+ and SO42- are spectator ions. 
E)  No precipitate will form.

Question 15

Fluorine is the reducing agent in the following reaction.
2KBr + F2 $\rarr$ Br2 + 2KF

Accepted Answer

A) True 
 B)False

Question 16

The two reactions shown here represent balanced molecular and net ionic reactions for the acid-base neutralization reaction between H3PO4(aq) and Ba(OH)2(aq).Molecular equation: 
2H3PO4(aq) + 3Ba(OH)2(aq) $\rarr$Ba3(PO4)2(s) + 6H2O(l)
Net ionic equation: 2H3PO4(aq) + 3Ba2+(aq) + 6OH-(aq) $\rarr$ Ba3(PO4)2(s) + 6H2O(l)

Accepted Answer

A) True 
 B)False

Question 17

The reaction below can be classified as which type of reaction
2 NO2(g) + H2O(l) $\rarr$ HNO2(aq) + HNO3(aq)

Accepted Answer

A)  Combination reaction 
B)  Acid-base neutralization reaction 
C)  Hydrogen displacement reaction 
D)  Disproportionation reaction 
E)  Combustion reaction 
A)  Combination reaction 
B)  Acid-base neutralization reaction 
C)  Hydrogen displacement reaction 
D)  Disproportionation reaction 
E)  Combustion reaction

Question 18

PbO2 is oxidized in this process. (Batteries in our cars generate electricity by the following chemical reaction.)
Pb + PbO2 + 2H2SO4 $\rarr$ 2PbSO4 + 2H2O

Accepted Answer

A) True 
 B)False

Question 19

Which of the following compounds is a strong electrolyte

Accepted Answer

A)  H2O 
B)  CH3OH 
C)  CH3CH2OH 
D)  HF 
E)  NaF 
A)  H2O 
B)  CH3OH 
C)  CH3CH2OH 
D)  HF 
E)  NaF

Question 20

Identify the correct net ionic equation for the reaction that occurs when solutions of Na3PO4 and Ca(NO3)2 are mixed.

Accepted Answer

A) Ca2+ + PO42-(aq) $\rarr$ CaPO4(s) 
B) 3Ca2+(aq) + 2PO43-(aq) $\rarr$Ca3(PO4)2(s) 
C)  Na+(aq) + NO3- $\rarr$ NaNO3(s) 
D)  Na+(aq) + Ca2+(aq) + PO43-(aq) $\rarr$ NaCaPO4(s) 
E) 2 Na3PO4(aq) + 3Ca(NO3)2(aq) $\rarr$ 6NaNO3(s) + Ca3(PO4)2(s) 
A) Ca2+ + PO42-(aq) $\rarr$ CaPO4(s) 
B) 3Ca2+(aq) + 2PO43-(aq) $\rarr$Ca3(PO4)2(s) 
C)  Na+(aq) + NO3- $\rarr$ NaNO3(s) 
D)  Na+(aq) + Ca2+(aq) + PO43-(aq) $\rarr$ NaCaPO4(s) 
E) 2 Na3PO4(aq) + 3Ca(NO3)2(aq) $\rarr$ 6NaNO3(s) + Ca3(PO4)2(s)

Exam 4: Reactions in Aqueous Solutions

Which substance is acting as a Brønsted acid in the following reaction HSO4- + NH4+ →\rarr→ H2SO4 + NH3

The solubility of Ba(NO3)2 is 130.5 grams per liter at 0 ∘\circ∘ C. How many moles of dissolved salt are present in 4.0 liters of a saturated solution of Ba(NO3)2 at 0ºC

The common constituent in all acid solutions is

What element is oxidized in the following chemical reaction H2SO4 + Cd(OH)2 →\rarr→ 2H2O + CdSO4

The highest possible oxidation number of nitrogen is

A 350. mL sample of 0.276M HNO3 is partially neutralized by 125 mL of 0.0120M Ca(OH)2. Find the concentration of nitric acid in the resulting solution.

The oxidation number of Mn in KMnO4 is

Which of the following compounds is a weak electrolyte

The oxidation number of N in NaNO3 is

Identify the major ions present in an aqueous HNO3 solution.

When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution

H2SO4 is reduced in this process. (Batteries in our cars generate electricity by the following chemical reaction.) Pb + PbO2 + 2H2SO4 →\rarr→ 2PbSO4 + 2H2O

The following reaction is an acid-base neutralization reaction. H2SO4(aq) + CaBr2(aq) →\rarr→ CaSO4(s) + 2HBr(g)

Which of the following will occur when solutions of CuSO4(aq) and BaCl2(aq) are mixed

Fluorine is the reducing agent in the following reaction. 2KBr + F2 →\rarr→ Br2 + 2KF

The reaction below can be classified as which type of reaction 2 NO2(g) + H2O(l) →\rarr→ HNO2(aq) + HNO3(aq)

PbO2 is oxidized in this process. (Batteries in our cars generate electricity by the following chemical reaction.) Pb + PbO2 + 2H2SO4 →\rarr→ 2PbSO4 + 2H2O

Which of the following compounds is a strong electrolyte

Identify the correct net ionic equation for the reaction that occurs when solutions of Na3PO4 and Ca(NO3)2 are mixed.

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Which substance is acting as a Brønsted acid in the following reaction HSO₄^- + NH₄⁺ $\rarr$ H₂SO₄ + NH₃

The solubility of Ba(NO₃)₂ is 130.5 grams per liter at 0^$\circ$C. How many moles of dissolved salt are present in 4.0 liters of a saturated solution of Ba(NO₃)₂ at 0ºC

What element is oxidized in the following chemical reaction H₂SO₄ + Cd(OH)₂ $\rarr$ 2H₂O + CdSO₄

A 350. mL sample of 0.276M HNO₃ is partially neutralized by 125 mL of 0.0120M Ca(OH)₂. Find the concentration of nitric acid in the resulting solution.

The oxidation number of Mn in KMnO₄ is

The oxidation number of N in NaNO₃ is

Identify the major ions present in an aqueous HNO₃ solution.

H₂SO₄ is reduced in this process. (Batteries in our cars generate electricity by the following chemical reaction.) Pb + PbO₂ + 2H₂SO₄ $\rarr$ 2PbSO₄ + 2H₂O

The following reaction is an acid-base neutralization reaction. H₂SO₄(aq) + CaBr₂(aq) $\rarr$ CaSO₄(s) + 2HBr(g)

Which of the following will occur when solutions of CuSO₄(aq) and BaCl₂(aq) are mixed

Fluorine is the reducing agent in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

The reaction below can be classified as which type of reaction 2 NO₂(g) + H₂O(l) $\rarr$ HNO₂(aq) + HNO₃(aq)

PbO₂ is oxidized in this process. (Batteries in our cars generate electricity by the following chemical reaction.) Pb + PbO₂ + 2H₂SO₄ $\rarr$ 2PbSO₄ + 2H₂O

Identify the correct net ionic equation for the reaction that occurs when solutions of Na₃PO₄ and Ca(NO₃)₂ are mixed.