Question 1

Identify the following compound as an electrolyte or nonelectrolyte: H2SO4.

Accepted Answer

Question 2

Identify the following as either a good or poor conductor of electricity: a crystal of Na2SO4.

Accepted Answer

Question 3

Silver chloride (AgCl)has an extremely low solubility in water; therefore, it is a weak electrolyte.

Accepted Answer

A) True 
 B)False

Question 4

What volume of concentrated nitric acid (15.0 M)is required to make 100.mL of a 3.0 M nitric acid solution?

Accepted Answer

The answer of What volume of concentrated nitric acid (15.0...

Question 5

Which of the following compounds is a weak acid?

Accepted Answer

A)  HF
B)  HCl
C)  HBr
D)  HI
E)  HClO4F) A) and D)
G) B) and C)

Question 6

The oxidation number of Cr in Cr2O72- is

Accepted Answer

A)  -12
B)  -7
C)  -2
D)  +6
E)  +7F) A) and B)
G) B) and E)

Question 7

What element is oxidized in the following chemical reaction? NiO2 + Cd + 2H2O →\rarr→ Ni(OH) 2 + Cd(OH) 2

Accepted Answer

A)  Ni
B)  Cd
C)  O
D)  H
E)  This is not a redox reaction. F) A) and B)
G) B) and D)

Question 8

Based on the solubility rules, which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed?

Accepted Answer

A)  ZnCl2 will precipitate; Mg2+ and SO42- will be spectator ions.
B)  ZnSO4 will precipitate; Mg2+ and Cl- will be spectator ions.
C)  MgSO4 will precipitate; Zn2+ and Cl- will be spectator ions.
D)  MgCl2 will precipitate; Zn2+ and SO42- will be spectator ions.
E)  No precipitate will form.F) A) and B)
G) C) and D)

Question 9

Which of the following represents a precipitation reaction?

Accepted Answer

A)  2H2(g) + O2(g)  →\rarr→ 2H2O(l) 
B)  CaBr2(aq) + H2SO4(aq)  →\rarr→  CaSO4(s) + 2HBr(g) 
C)  2KNO3(s)  →\rarr→ 2KNO2(s) + O2(g) 
D)  2KBr(aq) + Cl2(g)  →\rarr→ 2KCl(aq) + Br2(l) 
E)  2Al(s) + 3H2SO4(aq)  →\rarr→ Al2(SO4) 3(aq) + 3H2(g)  F) A) and B)
G) A) and C)

Question 10

During a titration the following data were collected.A 10.mL portion of an unknown monoprotic acid solution was titrated with 1.0 M NaOH; 40.mL of the base were required to neutralize the sample. How many moles of acid are present in 2.0 liters of this unknown solution?

Accepted Answer

The answer of During a titration the following data were...

Question 11

Thorium metal is prepared by reacting thorium oxide with calcium.
ThO2 + 2Ca $\rarr$ Th + 2CaO
Which substance is oxidized in this process?

Accepted Answer

Question 12

The distinguishing characteristic of all electrolyte solutions is that they

Accepted Answer

A)  contain molecules.
B)  conduct electricity.
C)  react with other solutions.
D)  always contain acids.
E)  conduct heat.F) A) and B)
G) A) and E)

Question 13

What is the chemical formula of the salt produced by the neutralization of hydrobromic acid with magnesium hydroxide?

Accepted Answer

A)  MgBr
B)  Mg2Br3
C)  Mg3Br2
D)  Mg2Br
E)  MgBr2F) A) and B)
G) A) and C)

Question 14

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 E)
G) D) and E)

Question 15

Identify the element being reduced in the following reaction.
4Al + 3O2 $\rarr$2Al2O3

Accepted Answer

Question 16

Thorium metal is prepared by reacting thorium oxide with calcium.
ThO2 + 2Ca $\rarr$ Th + 2CaO
What is the oxidizing agent in this process?

Accepted Answer

Question 17

Write balanced molecular and net ionic equations for the reaction that would occur between CuCl2(aq)and Pb(s).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Accepted Answer

Molecular equation: CuCl₂(aq)+ ...

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) B) and E)
G) C) and D)

Question 19

Identify the following as either a good or poor conductor of electricity: gasoline (C8H18).

Accepted Answer

Question 20

Which choice gives the correct oxidation numbers for all three elements in Ca(ClO) 2 in the order that the elements are shown in the formula?

Accepted Answer

A)  +2, +1, -2
B)  +2, -2, +1
C)  +2, -3, +2
D)  -2, +2, -1
E)  -2, +3, -2F) A) and B)
G) A) and C)

Exam 4: Reactions in Aqueous Solution

What element is oxidized in the following chemical reaction? NiO2 + Cd + 2H2O →\rarr→ Ni(OH) 2 + Cd(OH) 2

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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 AnswerverifiedShow Answer

Thorium metal is prepared by reacting thorium oxide with calcium. ThO2 + 2Ca →\rarr→ Th + 2CaO Which substance is oxidized in this process?

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What volume of concentrated nitric acid (15.0 M)is required to make 100.mL of a 3.0 M nitric acid solution?

Correct AnswerverifiedShow Answer

Thorium metal is prepared by reacting thorium oxide with calcium. ThO2 + 2Ca →\rarr→ Th + 2CaO What is the oxidizing agent in this process?

Correct AnswerverifiedShow Answer

During a titration the following data were collected.A 10.mL portion of an unknown monoprotic acid solution was titrated with 1.0 M NaOH; 40.mL of the base were required to neutralize the sample. How many moles of acid are present in 2.0 liters of this unknown solution?

Correct AnswerverifiedShow Answer

Which choice gives the correct oxidation numbers for all three elements in Ca(ClO) 2 in the order that the elements are shown in the formula?

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Identify the following as either a good or poor conductor of electricity: a crystal of Na2SO4.

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Based on the solubility rules, which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed?

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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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Write balanced molecular and net ionic equations for the reaction that would occur between CuCl2(aq)and Pb(s).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Correct AnswerverifiedMolecular equation: CuCl2(aq)+ ...View AnswerShow Answer

Identify the following compound as an electrolyte or nonelectrolyte: H2SO4.

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Silver chloride (AgCl)has an extremely low solubility in water; therefore, it is a weak electrolyte.

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Identify the following as either a good or poor conductor of electricity: gasoline (C8H18).

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The oxidation number of Cr in Cr2O72- is

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Which of the following compounds is a weak acid?

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Which of the following represents a precipitation reaction?

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Identify the element being reduced in the following reaction. 4Al + 3O2 →\rarr→ 2Al2O3

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What is the chemical formula of the salt produced by the neutralization of hydrobromic acid with magnesium hydroxide?

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The distinguishing characteristic of all electrolyte solutions is that they

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What element is oxidized in the following chemical reaction? NiO₂ + Cd + 2H₂O $\rarr$ Ni(OH) ₂ + Cd(OH) ₂

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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Thorium metal is prepared by reacting thorium oxide with calcium. ThO₂ + 2Ca $\rarr$ Th + 2CaO Which substance is oxidized in this process?

Correct Answer
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Thorium metal is prepared by reacting thorium oxide with calcium. ThO₂ + 2Ca $\rarr$ Th + 2CaO What is the oxidizing agent in this process?

Correct Answer
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Which choice gives the correct oxidation numbers for all three elements in Ca(ClO) ₂ in the order that the elements are shown in the formula?

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Identify the following as either a good or poor conductor of electricity: a crystal of Na₂SO₄.

Correct Answer
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Based on the solubility rules, which of the following will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed?

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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Write balanced molecular and net ionic equations for the reaction that would occur between CuCl₂(aq)and Pb(s).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Correct Answer
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Molecular equation: CuCl₂(aq)+ ...
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Identify the following compound as an electrolyte or nonelectrolyte: H₂SO₄.

Correct Answer
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Identify the following as either a good or poor conductor of electricity: gasoline (C₈H₁₈).

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The oxidation number of Cr in Cr₂O₇^2- is

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Identify the element being reduced in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

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