Question 1

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 M 
A) 0.210 M 
B) 0.00632 M 
C) 0.203 M 
D) 0.0240 M 
E) 0.197 M

Question 2

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. 
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.

Question 3

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

Accepted Answer

Question 4

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$Al2(SO4)3(aq)+ 3H2(g) 
A) 2H2(g)+ O2(g)$\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)

Question 5

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

Accepted Answer

Question 6

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 7

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 8

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

Accepted Answer

A) True 
 B)False

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

Question 10

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) MgBr2 
A) MgBr 
B) Mg2Br3 
C) Mg3Br2 
D) Mg2Br 
E) MgBr2

Question 11

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

Question 12

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

Question 13

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

Accepted Answer

Question 14

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 15

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 16

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

Question 17

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

Accepted Answer

Question 18

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 19

The oxidation number of Cr in Cr2O72- is

Accepted Answer

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

Question 20

Which of the following compounds is a weak acid?

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HI 
E) HClO4 
A) HF 
B) HCl 
C) HBr 
D) HI 
E) HClO4

Exam 4: Reactions in Aqueous Solution

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.

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

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

Which of the following represents a precipitation reaction?

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

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."

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

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

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

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

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

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?

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

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?

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

The distinguishing characteristic of all electrolyte solutions is that they

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

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

The oxidation number of Cr in Cr2O72- is

Which of the following compounds is a weak acid?

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

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.

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

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

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

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."

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

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

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

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?

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

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

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

The oxidation number of Cr in Cr₂O₇^2- is