Question 1

Which of the following pairs react to give both a precipitation and a neutralization reaction?

Accepted Answer

A)   Ca(OH) 2(aq)  and H2SO4(aq) 
B)   Mg(OH) 2(aq)  and H2SO4(aq) 
C)   Sr(OH) 2(aq)  and HNO3(aq) 
D)   Ba(OH) 2(aq)  and HNO3(aq)

Question 2

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

Accepted Answer

A)   ClO4-/(+7) 
B)   S2O32-/+2
C)   Fe2O3/+3
D)   HCO3-/+3
E)   CO2/+4

Question 3

The substance NaOH in water solution is a:

Accepted Answer

A)   nonelectrolyte
B)   weak electrolyte
C)   weak base
D)   strong electrolyte
E)   weak acid

Question 4

An insoluble compound will dissolve to an appreciable amount in water.

Accepted Answer

A) True 
 B)False

Question 5

What is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine gas is bubbled through aqueous sodium hydroxide to form aqueous sodium hypochlorite (NaOCl)  and sodium chloride?

Accepted Answer

A)   15
B)   11
C)   10
D)   8
E)   6

Question 6

Write the net ionic equation for the reaction of ammonium chloride and potassium hydroxide.

Accepted Answer

A)   NH4Cl(aq)  + KOH(aq)  → NH3(aq)  + KCl(aq)  + H2O
B)   NH+4 + OH- → NH3(aq)  + H2O
C)   NH4Cl(aq)  + OH- → NH3(aq)  + Cl- + H2O
D)   NH+4 + KOH → NH4OH(aq)  + K+
E)   no reaction

Question 7

Identify the reducing agent in the following reaction: 2 NO2(g)  + 7 H2(g)  → 2 NH3(g)  + 4 H2O(g)

Accepted Answer

A)   NO2
B)   NH3
C)   H2O
D)   H2
E)   There is no reducing agent.

Question 8

A solution is 0.20 M Ba(OH) 2. How many moles of H+ must be added to neutralize 100.0 mL of the solution?

Accepted Answer

A)   0.020 mol
B)   0.080 mol
C)   0.040 mol
D)   0.40 mol
E)   0.80 mol

Question 9

What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C2O42- (aq)  + MnO4- (aq)  → CO32- (aq)  + MnO2(s)

Accepted Answer

A)   4
B)   3
C)   2
D)   1
E)   0

Question 10

Choose the INCORRECT statement.

Accepted Answer

A)   A base produces hydrogen ions in solution.
B)   A strong acid is a strong electrolyte.
C)   Weak acids are weak electrolytes.
D)   In a neutralization reaction, an acid reacts with a base.
E)   Acids contain ionizable hydrogens.

Question 11

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO4- + SO32- → SO42- + Cl-
The sum of the coefficients is ________.

Accepted Answer

A)   8
B)   12
C)   10
D)   4
E)   6

Question 12

Complete the equation and indicate if a precipitate forms. Na+ + OH- + Mg2+ + Cl- →

Accepted Answer

A)   NaCl(s)  + Mg2+ + 2 OH-
B)   Mg(OH) 2(s)  + Na+ + Cl-
C)   MgCl2(s)  + Na+ + OH-
D)   MgCl2(s)  + Na(OH) (s) 
E)   no reaction

Question 13

Iron in the form FeCl2 can be determined by titration with potassium dichromate: 6FeCl2(aq)  + K2Cr2O7(aq)  + 14HCl(aq)  → 6FeCl3(aq)  + 2CrCl3(aq)  + 2KCl(aq)  + 7H2O(l) 
An iron sample of mass 0.800 g required 18.80 mL of 0.0120 M K2Cr2O7(aq)  to reach the end point. How many moles of FeCl2 were in the sample?

Accepted Answer

A)   1.43 × 10-2 mol
B)   1.35 × 10-3 mol
C)   3.75 × 10-5 mol
D)   2.26 × 10-4 mol
E)   1.13 × 10-4 mol

Question 14

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl + H2C2O4 + MnO2(s)  → MnCl2 + CO2(g)  + H2O
The sum of the coefficients is ________.

Accepted Answer

A)   7
B)   15
C)   45
D)   12
E)   9

Question 15

Weak acids almost completely dissociate.

Accepted Answer

A) True 
 B)False

Question 16

What volume of 0.110 M , H2SO4 is required to exactly neutralize 10.0 mL of 0.085 M NaOH?

Accepted Answer

A)   7.7 mL
B)   1.9 mL
C)   0.39 mL
D)   3.9 mL
E)   0.19 mL

Question 17

Which of the following solutions has the lowest concentration of sulfate ion?

Accepted Answer

A)   0.1 M Al2(SO4) 3
B)   0.2 M MgSO4
C)   0.3 M Li2SO4
D)   0.4 M K2SO4
E)   0.5 M CuSO4

Question 18

Balance the following oxidation-reduction reaction in acid solution: Fe(s)  → Fe2+ + H2(g) 
The sum of the coefficients is ________.

Accepted Answer

A)   2
B)   5
C)   8
D)   7
E)   9

Question 19

Which statement below best describes net ionic equations?

Accepted Answer

A)   A net ionic equation lists all ions in the solution.
B)   A net ionic equation is obtained when the ions forming the precipitate are removed from the molecular equation.
C)   A net ionic equation is a balanced chemical equation that includes only ions that actually participate in a reaction.
D)   A net ionic equation is a balanced chemical equation that includes all the ions present in a reaction mixture.
E)   A net ionic reaction is a balanced chemical equation that clearly shows spectator ions in a reaction.

Question 20

Balance the following oxidation-reduction reaction in acid solution: SO32- + MnO4- → SO42- + Mn2+ + H2O
The sum of the coefficients is ________.

Accepted Answer

A)   23
B)   30
C)   13
D)   45
E)   28

Exam 5: Introduction to Reactions in Aqueous Solutions

Balance the following oxidation-reduction reaction in acid solution: Fe(s) → Fe²⁺ + H₂(g) The sum of the coefficients is ________.

Correct Answer
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Correct Answer
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Write the net ionic equation for the reaction of ammonium chloride and potassium hydroxide.

Correct Answer
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An insoluble compound will dissolve to an appreciable amount in water.

Correct Answer
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Identify the reducing agent in the following reaction: 2 NO₂(g) + 7 H₂(g) → 2 NH₃(g) + 4 H₂O(g)

Correct Answer
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What volume of 0.110 M , H₂SO₄ is required to exactly neutralize 10.0 mL of 0.085 M NaOH?

Correct Answer
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The substance NaOH in water solution is a:

Correct Answer
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A solution is 0.20 M Ba(OH) ₂. How many moles of H+ must be added to neutralize 100.0 mL of the solution?

Correct Answer
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Which of the following solutions has the lowest concentration of sulfate ion?

Correct Answer
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Weak acids almost completely dissociate.

Correct Answer
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Complete the equation and indicate if a precipitate forms. Na⁺ + OH- + Mg²⁺ + Cl- →

Correct Answer
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Choose the INCORRECT statement.

Correct Answer
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Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl + H₂C₂O₄ + MnO₂(s) → MnCl₂ + CO₂(g) + H₂O The sum of the coefficients is ________.

Correct Answer
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What is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine gas is bubbled through aqueous sodium hydroxide to form aqueous sodium hypochlorite (NaOCl) and sodium chloride?

Correct Answer
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Which of the following pairs react to give both a precipitation and a neutralization reaction?

Correct Answer
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In which of the following pairs is the oxidation number for the underlined element INCORRECT?

Correct Answer
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Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO₄^- + SO₃^2- → SO₄^2- + Cl- The sum of the coefficients is ________.

Correct Answer
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What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C₂O₄^2- (aq) + MnO₄^- (aq) → CO₃^2- (aq) + MnO₂(s)

Correct Answer
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Which statement below best describes net ionic equations?

Correct Answer
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Balance the following oxidation-reduction reaction in acid solution: SO₃^2- + MnO₄^- → SO₄^2- + Mn²⁺ + H₂O The sum of the coefficients is ________.

Correct Answer
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Exam 5: Introduction to Reactions in Aqueous Solutions

Balance the following oxidation-reduction reaction in acid solution: Fe(s) → Fe2+ + H2(g) The sum of the coefficients is ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Write the net ionic equation for the reaction of ammonium chloride and potassium hydroxide.

Correct AnswerverifiedShow Answer

An insoluble compound will dissolve to an appreciable amount in water.

Correct AnswerverifiedShow Answer

Identify the reducing agent in the following reaction: 2 NO2(g) + 7 H2(g) → 2 NH3(g) + 4 H2O(g)

Correct AnswerverifiedShow Answer

What volume of 0.110 M , H2SO4 is required to exactly neutralize 10.0 mL of 0.085 M NaOH?

Correct AnswerverifiedShow Answer

The substance NaOH in water solution is a:

Correct AnswerverifiedShow Answer

A solution is 0.20 M Ba(OH) 2. How many moles of H+ must be added to neutralize 100.0 mL of the solution?

Correct AnswerverifiedShow Answer

Which of the following solutions has the lowest concentration of sulfate ion?

Correct AnswerverifiedShow Answer

Weak acids almost completely dissociate.

Correct AnswerverifiedShow Answer

Complete the equation and indicate if a precipitate forms. Na+ + OH- + Mg2+ + Cl- →

Correct AnswerverifiedShow Answer

Choose the INCORRECT statement.

Correct AnswerverifiedShow Answer

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl + H2C2O4 + MnO2(s) → MnCl2 + CO2(g) + H2O The sum of the coefficients is ________.

Correct AnswerverifiedShow Answer

What is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine gas is bubbled through aqueous sodium hydroxide to form aqueous sodium hypochlorite (NaOCl) and sodium chloride?

Correct AnswerverifiedShow Answer

Which of the following pairs react to give both a precipitation and a neutralization reaction?

Correct AnswerverifiedShow Answer

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

Correct AnswerverifiedShow Answer

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO4- + SO32- → SO42- + Cl- The sum of the coefficients is ________.

Correct AnswerverifiedShow Answer

What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C2O42- (aq) + MnO4- (aq) → CO32- (aq) + MnO2(s)

Correct AnswerverifiedShow Answer

Which statement below best describes net ionic equations?

Correct AnswerverifiedShow Answer

Balance the following oxidation-reduction reaction in acid solution: SO32- + MnO4- → SO42- + Mn2+ + H2O The sum of the coefficients is ________.

Correct AnswerverifiedShow Answer

Balance the following oxidation-reduction reaction in acid solution: Fe(s) → Fe²⁺ + H₂(g) The sum of the coefficients is ________.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Identify the reducing agent in the following reaction: 2 NO₂(g) + 7 H₂(g) → 2 NH₃(g) + 4 H₂O(g)

Correct Answer
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What volume of 0.110 M , H₂SO₄ is required to exactly neutralize 10.0 mL of 0.085 M NaOH?

Correct Answer
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Correct Answer
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A solution is 0.20 M Ba(OH) ₂. How many moles of H+ must be added to neutralize 100.0 mL of the solution?

Correct Answer
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Correct Answer
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Correct Answer
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Complete the equation and indicate if a precipitate forms. Na⁺ + OH- + Mg²⁺ + Cl- →

Correct Answer
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Correct Answer
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Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl + H₂C₂O₄ + MnO₂(s) → MnCl₂ + CO₂(g) + H₂O The sum of the coefficients is ________.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: ClO₄^- + SO₃^2- → SO₄^2- + Cl- The sum of the coefficients is ________.

Correct Answer
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What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution? C₂O₄^2- (aq) + MnO₄^- (aq) → CO₃^2- (aq) + MnO₂(s)

Correct Answer
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Correct Answer
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Balance the following oxidation-reduction reaction in acid solution: SO₃^2- + MnO₄^- → SO₄^2- + Mn²⁺ + H₂O The sum of the coefficients is ________.

Correct Answer
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