Question 1

Which represents the result of mixing equal volumes of 1 M aluminum chloride,2 M magnesium chloride,and 1 M potassium chloride solution? (Each sphere represents 1 mol of ions.)

Accepted Answer

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

Question 2

A 4.691-g sample of MgCl2 is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

Accepted Answer

A)  6.25 M
B)  6.57 × 10-2 M
C)  4.38 × 10-2 M
D)  3.29 × 10-2 M
E)  2.19 ×10-2 MF) B) and E)
G) None of the above

Question 3

A 34.62-mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution.What is the concentration of the original sulfuric acid solution?

Accepted Answer

A)  0.0229 M
B)  0.218 M
C)  0.0523 M
D)  0.209 M
E)  0.105 MF) All of the above
G) A) and E)

Question 4

Sodium hydroxide is water soluble.

Accepted Answer

A) True 
 B)False

Question 5

Which is the correct description of a solution?

Accepted Answer

A)  A solution is a heterogeneous mixture of two or more substances.
B)  A solution is a homogeneous mixture of two or more substances.
C)  A solution may be a gas,solid,or liquid.
D)  A solution is any mixture of two or more substances.
E)  The first and second choices are correctF) A) and C)
G) A) and D)

Question 6

In the reaction 5H2O2 + 2MnO4- + 6H+→ 2Mn2+ + 8H2O + 5O2,what is the oxidizing agent?

Accepted Answer

A)  H2O2
B)  MnO4-
C)  H+
D)  Mn2+
E)  O2F) A) and B)
G) C) and D)

Question 7

Which salt is 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) B) and D)
G) B) and C)

Question 8

Based on the solubility rules,which one of these compounds is soluble in water?

Accepted Answer

A)  CaSO4
B)  BaSO4
C)  PbSO4
D)  K2SO4
E)  Ag2SO4F) None of the above
G) B) and E)

Question 9

If aqueous solutions of Pb(NO3) 2 and NaCl are mixed,which ions,if any,are spectator ions? Pb(NO3) 2(aq) + 2NaCl(aq) → PbCl2(s) + 2NaNO3(aq)

Accepted Answer

A)  Pb2+(aq) ,Cl-(aq) 
B)  Na+(aq) ,NO3- (aq) 
C)  Pb2+(aq) ,NO3-(aq) 
D)  Na+(aq) ,Cl-(aq) 
E)  None are spectator ions.F) A) and E)
G) D) and E)

Question 10

The spectator ion is always included in the net ionic equation.

Accepted Answer

A) True 
 B)False

Question 11

Which of these chemical equations describes a precipitation reaction?

Accepted Answer

A)  2H2(g) + O2(g) → 2H2O(l) 
B)  CaBr2(aq) + H2SO4 (aq) → CaSO4(s) + 2HBr(g) 
C)  2KNO3(s) → 2KNO2(s) + O2(g) 
D)  2KBr(aq) + Cl2(g) → 2KCl(aq) + Br2(l) 
E)  2Al(s) + 3H2SO4(aq) → Al2(SO4) 3(aq) + 3H2(g) F) B) and E)
G) None of the above

Question 12

What is the oxidizing agent in the following reaction? 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

Accepted Answer

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

Question 13

Which substance is present in the largest proportion in a solution?

Accepted Answer

A)  salute
B)  gas
C)  solvent
D)  solid
E)  soluteF) B) and D)
G) All of the above

Question 14

If aqueous solutions of Na2CO3 and BaCl2 are mixed,which insoluble precipitate is formed?

Accepted Answer

A)  Ba2CO3
B)  BaCO3
C)  NaCl
D)  NaCl2
E)  BaOF) B) and D)
G) B) and C)

Question 15

Which of these compounds is a weak electrolyte?

Accepted Answer

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

Question 16

The ______________ ______________ is the point in the titration where the moles of base added is equal to the moles of acid.

Accepted Answer

The answer of The ______________ ______________ is the point in...

Question 17

What volume of water must be added to 300 mL of 0.75 M HCl to dilute the solution to 0.25 M?

Accepted Answer

A)  900 mL
B)  600 mL
C)  300 mL
D)  930 mL
E)  100 mLF) None of the above
G) A) and E)

Question 18

Which of these chemical equations describes a metal displacement reaction?

Accepted Answer

A)  2NaN3(s) → 2Na(s) + 3N2(g) 
B)  Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s) 
C)  3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) 
D)  2P(s) + 3Cl2(g) → 2PCl3(g) 
E)  2ZnS(s) + 3O2(g) → 2ZnO(s) + 2SO2(g) F) D) and E)
G) A) and E)

Question 19

Identify the major ions present in an aqueous LiOH solution.

Accepted Answer

A)  Li2+,O-,H-
B)  Li+,OH-
C)  LiO-,H+
D)  Li+,O2-,H+
E)  Li-,OH+F) A) and E)
G) B) and C)

Question 20

Which of these compounds is a strong electrolyte?

Accepted Answer

A)  H2O
B)  N2
C)  CH3COOH (acetic acid) 
D)  C2H6O (ethanol) 
E)  KOHF) B) and E)
G) A) and B)

Exam 4: Reactions in Aqueous Solutions

If aqueous solutions of Pb(NO3) 2 and NaCl are mixed,which ions,if any,are spectator ions? Pb(NO3) 2(aq) + 2NaCl(aq) → PbCl2(s) + 2NaNO3(aq)

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If aqueous solutions of Na2CO3 and BaCl2 are mixed,which insoluble precipitate is formed?

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A 34.62-mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution.What is the concentration of the original sulfuric acid solution?

Correct AnswerverifiedShow Answer

Which represents the result of mixing equal volumes of 1 M aluminum chloride,2 M magnesium chloride,and 1 M potassium chloride solution? (Each sphere represents 1 mol of ions.)

Correct AnswerverifiedShow Answer

Which of these compounds is a weak electrolyte?

Correct AnswerverifiedShow Answer

The ______________ ______________ is the point in the titration where the moles of base added is equal to the moles of acid.

Correct AnswerverifiedShow Answer

What is the oxidizing agent in the following reaction? 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

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Sodium hydroxide is water soluble.

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The spectator ion is always included in the net ionic equation.

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What volume of water must be added to 300 mL of 0.75 M HCl to dilute the solution to 0.25 M?

Correct AnswerverifiedShow Answer

Based on the solubility rules,which one of these compounds is soluble in water?

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Which of these chemical equations describes a metal displacement reaction?

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A 4.691-g sample of MgCl2 is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

Correct AnswerverifiedShow Answer

Which salt is produced by the neutralization of nitric acid with calcium hydroxide?

Correct AnswerverifiedShow Answer

Which of these chemical equations describes a precipitation reaction?

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Identify the major ions present in an aqueous LiOH solution.

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Which substance is present in the largest proportion in a solution?

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Which is the correct description of a solution?

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In the reaction 5H2O2 + 2MnO4- + 6H+→ 2Mn2+ + 8H2O + 5O2,what is the oxidizing agent?

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Which of these compounds is a strong electrolyte?

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If aqueous solutions of Pb(NO₃) ₂ and NaCl are mixed,which ions,if any,are spectator ions? Pb(NO₃) ₂(aq) + 2NaCl(aq) → PbCl₂(s) + 2NaNO₃(aq)

Correct Answer
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If aqueous solutions of Na₂CO₃ and BaCl₂ are mixed,which insoluble precipitate is formed?

Correct Answer
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A 34.62-mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H₂SO₄ solution.What is the concentration of the original sulfuric acid solution?

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The is the point in the titration where the moles of base added is equal to the moles of acid.

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What is the oxidizing agent in the following reaction? 5Fe²⁺(aq) + MnO₄^-(aq) + 8H⁺(aq) → 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l)

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A 4.691-g sample of MgCl₂ is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

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In the reaction 5H₂O₂ + 2MnO₄^- + 6H⁺→ 2Mn²⁺ + 8H₂O + 5O₂,what is the oxidizing agent?

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