Question 1

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. What is the molarity of the acid solution?

Accepted Answer

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

Question 2

Which of the following compounds is a weak electrolyte?

Accepted Answer

A)  HCl
B)  CH3COOH (acetic acid) 
C)  C6H12O6 (glucose) 
D)  O2
E)  NaClF) C) and D)
G) A) and D)

Question 3

Which of the following is an example of a disproportionation reaction?

Accepted Answer

A)  2C2H6(g) + 7O2(g)  →\rarr→ 4CO2(g) + 6H2O(l) 
B)  2KBr(aq) + Cl2(g)  →\rarr→ 2KCl(aq) + Br2(l) 
C)  2H2O2(aq)  →\rarr→  2H2O(l) + O2(g) 
D)  CaBr2(aq) + H2SO4(aq)  →\rarr→ CaSO4(s) + 2HBr(g) 
E)  2Al(s) + 3H2SO4(aq)  →\rarr→ Al2(SO4) 3(aq) + 3H2(g)  F) All of the above
G) A) and C)

Question 4

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

Accepted Answer

Question 5

What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?

Accepted Answer

A)  CaNO3
B)  Ca2(NO3) 3
C)  Ca3(NO3) 2
D)  Ca2NO3
E)  Ca(NO3) 2F) A) and B)
G) C) and D)

Question 6

Select the compound in which sulfur has its highest possible oxidation number.

Accepted Answer

A)  H2S
B)  SO2
C)  SCl2
D)  H2SO3
E)  Na2SO4F) A) and B)
G) B) and D)

Question 7

A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper and the solution turned a blue color characteristic of copper(II)ions.
Write the net ionic equation for this reaction.

Accepted Answer

Cu(s)+ 2Ag...

Question 8

Identify the oxidizing agent in the following reaction.
4Al + 3O2 $\rarr$2Al2O3

Accepted Answer

Question 9

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Accepted Answer

(Answers will vary.)An electrolyte is a ...

Question 10

One method of determining the concentration of hydrogen peroxide (H2O2) in a solution is through titration with iodide ion. The net ionic equation for this reaction is H2O2 + 2I- +2H+  →\rarr→  I2 + 2H2O
A 50.00 mL sample of a hydrogen peroxide solution is found to react completely with 37.12 mL of a 0.1500 M KI solution. What is the concentration of hydrogen peroxide in the sample?

Accepted Answer

A)  5.568 * 10-2 M
B)  0.2227 M
C)  0.1010 M
D)  0.4041 M
E)  0.1114 M F) A) and B)
G) A) and C)

Question 11

Identify the major ionic species present in an aqueous solution of Na2CO3.

Accepted Answer

A)  Na2+, CO32-
B)  Na2+, C2 -, O3
C)  Na+, C4+, O32-
D)  Na+, C+, O2-
E)  Na+, CO32-F) A) and B)
G) B) and C)

Question 12

In the following chemical reaction the oxidizing agent is 5S + 6KNO3 + 2CaCO3  →\rarr→ 3K2SO4 + 2CaSO4 + CO2 + 3N2

Accepted Answer

A)  S
B)  N2
C)  KNO3
D)  CaSO4
E)  CaCO3 F) A) and B)
G) All of the above

Question 13

Identify the major ionic species present in an aqueous solution of K2SO4.

Accepted Answer

A)  K2+, S6+, O48-
B)  K2+, S6+, 4O2-
C)  2K+, S6+, O48-
D)  2K+, S6+, 4O2-
E)  2K+, SO42-F) A) and E)
G) B) and D)

Question 14

Based on the solubility rules, which one of the following should be soluble in water?

Accepted Answer

A)  CaSO4
B)  BaSO4
C)  PbSO4
D)  K2SO4
E)  AgClF) B) and C)
G) B) and E)

Question 15

The concentration of oxalate ion (C2O42-) in a sample can be determined by titration with a solution of permanganate ion (MnO4-) of known concentration. The net ionic equation for this reaction is 2MnO4- + 5C2O42- + 16H+  →\rarr→  2Mn2+ + 8H2O + 10CO2
 A 30.00 mL sample of an oxalate solution is found to react completely with 21.93 mL of a 0.1725 M solution of MnO4-. What is the oxalate ion concentration in the sample?

Accepted Answer

A)  0.02914 M
B)  0.4312 M
C)  0.1821 M
D)  0.3152 M
E)  0.05044 M F) A) and E)
G) A) and B)

Question 16

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) A) and C)
G) A) and E)

Question 17

Identify the element being reduced in the following reaction.
2KBr + F2 $\rarr$Br2 + 2KF

Accepted Answer

Question 18

The oxidation number of N in NO is +7.

Accepted Answer

A) True 
 B)False

Question 19

What mass of K2CO3 is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Accepted Answer

A)  4.15 g
B)  10.4 g
C)  13.8 g
D)  2.07 g
E)  1.49 gF) A) and D)
G) D) and E)

Question 20

The oxidation number of Cl in ClO3- is

Accepted Answer

A)  -1
B)  +7
C)  +5
D)  +3
E)  None of the above.F) A) and E)
G) A) and D)

Exam 4: Reactions in Aqueous Solution

What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?

Correct Answer
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Based on the solubility rules, which one of the following should be soluble in water?

Correct Answer
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Identify the major ionic species present in an aqueous solution of Na₂CO₃.

Correct Answer
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Select the compound in which sulfur has its highest possible oxidation number.

Correct Answer
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Identify the major ionic species present in an aqueous solution of K₂SO₄.

Correct Answer
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Identify the major ions present in an aqueous HNO₃solution.

Correct Answer
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Which of the following is an example of a disproportionation reaction?

Correct Answer
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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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What mass of K₂CO₃ is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Correct Answer
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Correct Answer
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Which of the following compounds is a weak electrolyte?

Correct Answer
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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. What is the molarity of the acid solution?

Correct Answer
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In the following chemical reaction the oxidizing agent is 5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

Correct Answer
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A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper and the solution turned a blue color characteristic of copper(II)ions. Write the net ionic equation for this reaction.

Correct Answer
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Cu(s)+ 2Ag...
View Answer

Identify the oxidizing agent in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

Correct Answer
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The oxidation number of N in NO is +7.

Correct Answer
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Identify the element being reduced in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

Correct Answer
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Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Correct Answer
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(Answers will vary.)An electrolyte is a ...
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The oxidation number of Cl in ClO₃^- is

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Exam 4: Reactions in Aqueous Solution

What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?

Correct AnswerverifiedShow Answer

Based on the solubility rules, which one of the following should be soluble in water?

Correct AnswerverifiedShow Answer

Identify the major ionic species present in an aqueous solution of Na2CO3.

Correct AnswerverifiedShow Answer

Select the compound in which sulfur has its highest possible oxidation number.

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Identify the major ionic species present in an aqueous solution of K2SO4.

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Identify the major ions present in an aqueous HNO3 solution.

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Which of the following is an example of a disproportionation reaction?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What mass of K2CO3 is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following compounds is a weak electrolyte?

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. What is the molarity of the acid solution?

Correct AnswerverifiedShow Answer

In the following chemical reaction the oxidizing agent is 5S + 6KNO3 + 2CaCO3 →\rarr→ 3K2SO4 + 2CaSO4 + CO2 + 3N2

Correct AnswerverifiedShow Answer

A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper and the solution turned a blue color characteristic of copper(II)ions. Write the net ionic equation for this reaction.

Correct AnswerverifiedCu(s)+ 2Ag...View AnswerShow Answer

Identify the oxidizing agent in the following reaction. 4Al + 3O2 →\rarr→ 2Al2O3

Correct AnswerverifiedShow Answer

The oxidation number of N in NO is +7.

Correct AnswerverifiedShow Answer

Identify the element being reduced in the following reaction. 2KBr + F2 →\rarr→ Br2 + 2KF

Correct AnswerverifiedShow Answer

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Correct Answerverified(Answers will vary.)An electrolyte is a ...View AnswerShow Answer

The oxidation number of Cl in ClO3- is

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Correct Answer
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Correct Answer
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Identify the major ionic species present in an aqueous solution of Na₂CO₃.

Correct Answer
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Correct Answer
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Identify the major ionic species present in an aqueous solution of K₂SO₄.

Correct Answer
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Identify the major ions present in an aqueous HNO₃solution.

Correct Answer
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Correct Answer
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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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What mass of K₂CO₃ is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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In the following chemical reaction the oxidizing agent is 5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

Correct Answer
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Correct Answer
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Cu(s)+ 2Ag...
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Identify the oxidizing agent in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

Correct Answer
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Correct Answer
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Identify the element being reduced in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

Correct Answer
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Correct Answer
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(Answers will vary.)An electrolyte is a ...
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The oxidation number of Cl in ClO₃^- is

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