Question 1

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)  F) A) and B)
G) B) and D)

Question 2

The oxidation number of N in NaNO3 is

Accepted Answer

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

Question 3

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 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 F) C) and E)
G) A) and B)

Question 5

The highest possible oxidation number of nitrogen is

Accepted Answer

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

Question 6

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 7

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+ F) A) and B)
G) None of the above

Question 8

The common constituent in all acid solutions is

Accepted Answer

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

Question 9

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-F) C) and D)
G) A) and E)

Question 10

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 F) A) and E)
G) A) and D)

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 MF) A) and C)
G) A) and D)

Question 12

The oxidation number of Mn in KMnO4 is

Accepted Answer

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

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 15

Which of the following compounds is a weak electrolyte

Accepted Answer

A)   HCl
B)   NH3
C)   C6H12O6 (glucose) 
D)   N2
E)   KClF) D) and E)
G) C) and E)

Question 16

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 17

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.F) A) and B)
G) B) and E)

Question 18

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 MF) A) and D)
G) D) and E)

Question 19

Which of the following compounds is a strong electrolyte

Accepted Answer

A)   H2O
B)   CH3OH
C)   CH3CH2OH
D)   HF
E)   NaFF) A) and B)
G) C) and D)

Question 20

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 F) A) and B)
G) None of the above

Exam 4: Reactions in Aqueous Solutions

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

Correct Answer
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The highest possible oxidation number of nitrogen is

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

Correct Answer
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Identify the major ions present in an aqueous HNO₃ solution.

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

Correct Answer
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The oxidation number of N in NaNO₃ is

Correct Answer
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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.

Correct Answer
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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

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

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

Correct Answer
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The common constituent in all acid solutions is

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

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

Correct Answer
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Which of the following compounds is a strong electrolyte

Correct Answer
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Which of the following compounds is a weak electrolyte

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

Correct Answer
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The oxidation number of Mn in KMnO₄ is

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

Correct Answer
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Exam 4: Reactions in Aqueous Solutions

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

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The highest possible oxidation number of nitrogen is

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

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Identify the major ions present in an aqueous HNO3 solution.

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

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The oxidation number of N in NaNO3 is

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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

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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.

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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

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

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

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The common constituent in all acid solutions is

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

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

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Which of the following compounds is a strong electrolyte

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Which of the following compounds is a weak electrolyte

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

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The oxidation number of Mn in KMnO4 is

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

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

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

Correct Answer
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Identify the major ions present in an aqueous HNO₃ solution.

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

Correct Answer
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The oxidation number of N in NaNO₃ is

Correct Answer
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Correct Answer
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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.

Correct Answer
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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

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

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

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

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

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

Correct Answer
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The oxidation number of Mn in KMnO₄ is

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

Correct Answer
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