Question 1

In the following chemical reaction the oxidizing agent is 5H2O2 + 2MnO4- + 6H+  →\rarr→  2Mn2+ + 8H2O + 5O2

Accepted Answer

A)   H2O2.
B)   MnO4-.
C)   H+.
D)   Mn2+.
E)   O2. F) D) and E)
G) A) and D)

Question 2

For the perchlorate ion ClO4- , what are the oxidation states of the Cl and O, respectively

Accepted Answer

A)   - 1, - 2
B)   +8, - 2
C)   +7, - 2
D)   +6, - 2
E)   +2, - 1F) A) and B)
G) All of the above

Question 3

Identify the oxidizing agent in the following chemical reaction.
2MnO4- + 5H2SO3  →\rarr→  2Mn2+ + 5SO42- + 4H+ + 3H2O

Accepted Answer

A)   MnO4-
B)   H2SO3
C)   Mn2+
D)   SO42-
E)   H+ F) All of the above
G) A) and C)

Question 4

What mass of Li3PO4 is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M

Accepted Answer

A)   6.75 g
B)   10.1 g
C)   19.3 g
D)   30.4 g
E)   3.38 gF) C) and D)
G) D) and E)

Question 5

How many total electrons are transferred in the following reaction
4 P(s)  + 5O2(g)   →\rarr→   2P2O5(s)

Accepted Answer

A)   5
B)   10
C)   15
D)   20
E)   25 F) A) and B)
G) A) and C)

Question 6

Sugar dissolves in water, therefore it is a strong electrolyte.

Accepted Answer

A) True 
 B)False

Question 7

The highest possible oxidation number of carbon is

Accepted Answer

A)   +8.
B)   +6.
C)   +4.
D)   +2.
E)   -4.F) C) and D)
G) None of the above

Question 8

Starting with solid KCl and water, how many grams of KCl are needed to prepare 3.00 liters of a 2.00 M KCl solution

Accepted Answer

A)   417 g
B)   427 g
C)   437 g
D)   447 g
E)   None of the aboveF) C) and D)
G) A) and C)

Question 9

Identify the reducing agent in the following chemical reaction.
5Fe2+(aq)  + MnO4-(aq) + 8H+(aq)   →\rarr→  5Fe3+(aq)  + Mn2+(aq)  + 4H2O(l)

Accepted Answer

A)   Fe2+
B)   MnO4-
C)   H+
D)   Mn2+
E)   Fe3+ F) A) and C)
G) A) and E)

Question 10

What element is reduced in the following chemical reaction
Cu + 2H2SO4  →\rarr→   CuSO4 + SO2 + 2H2O

Accepted Answer

A)   Cu
B)   H
C)   S
D)   O
E)   H2O F) A) and E)
G) A) and D)

Question 11

H2O is acting as a Brønsted acid in the following reaction.
NH3 + H2O $\rarr$NH4+ + OH-

Accepted Answer

A) True 
 B)False

Question 12

A 350. mL solution of 0.150 M HNO3(aq)  is mixed with a solution of 230. mL of 0.240 M HCl(aq) . How many moles of H+(aq)  are present in the final solution

Accepted Answer

A)   0.0525 moles H+
B)   0.108 moles H+
C)   0.186 moles H+
D)   0.0539 moles H+
E)   0.195 moles H+F) B) and E)
G) A) and B)

Exam 4: Reactions in Aqueous Solutions

In the following chemical reaction the oxidizing agent is 5H₂O₂ + 2MnO₄^- + 6H⁺ $\rarr$ 2Mn²⁺ + 8H₂O + 5O₂

Correct Answer
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A 350. mL solution of 0.150 M HNO₃(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq) . How many moles of H⁺(aq) are present in the final solution

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The highest possible oxidation number of carbon is

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Sugar dissolves in water, therefore it is a strong electrolyte.

Correct Answer
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For the perchlorate ion ClO₄^- , what are the oxidation states of the Cl and O, respectively

Correct Answer
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H₂O is acting as a Brønsted acid in the following reaction. NH₃ + H₂O $\rarr$ NH₄⁺ + OH^-

Correct Answer
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What element is reduced in the following chemical reaction Cu + 2H₂SO₄ $\rarr$ CuSO₄ + SO₂ + 2H₂O

Correct Answer
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Identify the reducing agent in the following chemical reaction. 5Fe²⁺(aq) + MnO₄^-(aq) + 8H⁺(aq) $\rarr$ 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l)

Correct Answer
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How many total electrons are transferred in the following reaction 4 P(s) + 5O₂(g) $\rarr$ 2P₂O₅(s)

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What mass of Li₃PO₄ is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M

Correct Answer
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Identify the oxidizing agent in the following chemical reaction. 2MnO₄^- + 5H₂SO₃ $\rarr$ 2Mn²⁺ + 5SO₄^2- + 4H⁺ + 3H₂O

Correct Answer
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Starting with solid KCl and water, how many grams of KCl are needed to prepare 3.00 liters of a 2.00 M KCl solution

Correct Answer
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Exam 4: Reactions in Aqueous Solutions

In the following chemical reaction the oxidizing agent is 5H2O2 + 2MnO4- + 6H+ →\rarr→ 2Mn2+ + 8H2O + 5O2

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A 350. mL solution of 0.150 M HNO3(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq) . How many moles of H+(aq) are present in the final solution

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The highest possible oxidation number of carbon is

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Sugar dissolves in water, therefore it is a strong electrolyte.

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For the perchlorate ion ClO4- , what are the oxidation states of the Cl and O, respectively

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H2O is acting as a Brønsted acid in the following reaction. NH3 + H2O →\rarr→ NH4+ + OH-

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What element is reduced in the following chemical reaction Cu + 2H2SO4 →\rarr→ CuSO4 + SO2 + 2H2O

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Identify the reducing agent in the following chemical reaction. 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) →\rarr→ 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

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How many total electrons are transferred in the following reaction 4 P(s) + 5O2(g) →\rarr→ 2P2O5(s)

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What mass of Li3PO4 is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M

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Identify the oxidizing agent in the following chemical reaction. 2MnO4- + 5H2SO3 →\rarr→ 2Mn2+ + 5SO42- + 4H+ + 3H2O

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Starting with solid KCl and water, how many grams of KCl are needed to prepare 3.00 liters of a 2.00 M KCl solution

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In the following chemical reaction the oxidizing agent is 5H₂O₂ + 2MnO₄^- + 6H⁺ $\rarr$ 2Mn²⁺ + 8H₂O + 5O₂

Correct Answer
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A 350. mL solution of 0.150 M HNO₃(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq) . How many moles of H⁺(aq) are present in the final solution

Correct Answer
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Correct Answer
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Correct Answer
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For the perchlorate ion ClO₄^- , what are the oxidation states of the Cl and O, respectively

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H₂O is acting as a Brønsted acid in the following reaction. NH₃ + H₂O $\rarr$ NH₄⁺ + OH^-

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What element is reduced in the following chemical reaction Cu + 2H₂SO₄ $\rarr$ CuSO₄ + SO₂ + 2H₂O

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Identify the reducing agent in the following chemical reaction. 5Fe²⁺(aq) + MnO₄^-(aq) + 8H⁺(aq) $\rarr$ 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l)

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How many total electrons are transferred in the following reaction 4 P(s) + 5O₂(g) $\rarr$ 2P₂O₅(s)

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What mass of Li₃PO₄ is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M

Correct Answer
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Identify the oxidizing agent in the following chemical reaction. 2MnO₄^- + 5H₂SO₃ $\rarr$ 2Mn²⁺ + 5SO₄^2- + 4H⁺ + 3H₂O

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Correct Answer
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