Question 1

Which balanced chemical equation could represent the following result of a precipitation reaction?

Accepted Answer

A)  2K3PO4(aq) + 3Cr2(SO4)3(aq) → CrPO4(s) + 6KCl(aq) 
B)  MgSO4(aq) + 2AgNO3(aq) → Ag2SO4(s) + Mg(NO3)2(aq) 
C)  MgCl2(aq) + 2AgC2H3O2(aq) → 2AgCl(s) + Mg(C2H3O2)2(aq) 
D)  K2CrO4(aq) + 2AgNO3(aq) → Ag2CrO4(s) + 2KNO3(aq) 
E)  K2S(aq) + Pb(NO3)2(aq) → PbS(s) + 2KNO3(aq) 
A)  2K3PO4(aq) + 3Cr2(SO4)3(aq) → CrPO4(s) + 6KCl(aq) 
B)  MgSO4(aq) + 2AgNO3(aq) → Ag2SO4(s) + Mg(NO3)2(aq) 
C)  MgCl2(aq) + 2AgC2H3O2(aq) → 2AgCl(s) + Mg(C2H3O2)2(aq) 
D)  K2CrO4(aq) + 2AgNO3(aq) → Ag2CrO4(s) + 2KNO3(aq) 
E)  K2S(aq) + Pb(NO3)2(aq) → PbS(s) + 2KNO3(aq)

Question 2

Which salt is formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

Accepted Answer

A)  CaO 
B)  CaCl 
C)  CaH2 
D)  CaCl2 
E)  NaCl 
A)  CaO 
B)  CaCl 
C)  CaH2 
D)  CaCl2 
E)  NaCl

Question 3

OH- is called the ________ ________.

Accepted Answer

Question 4

A 250-mL sample of 0.0328 M HCl is partially neutralized by the addition of 100. mL of 0.0245 M NaOH. Find the concentration of hydrochloric acid in the resulting solution.

Accepted Answer

A)  0.00700 M 
B)  0.0164 M 
C)  0.0383 M 
D)  0.0230 M 
E)  0.0575 M 
A)  0.00700 M 
B)  0.0164 M 
C)  0.0383 M 
D)  0.0230 M 
E)  0.0575 M

Question 5

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

Question 6

Given the following information, write a short activity series for the metals copper, silver, lead, and zinc.
Expt. #1: copper + silver nitrate
Observation: The copper is becoming coated with a substance.
Expt. #2: lead + copper(II) nitrate
Observation: The lead is turning black and crumbling.
Expt. #3: zinc + lead(II) nitrate
Observation: The solid zinc falls apart.

Accepted Answer

Most active Zn, next

Question 7

Which is a correct description of the following reaction? H2SO4 + Cd(OH)2 → 2H2O + CdSO4

Accepted Answer

A)  This reaction is an acid-base reaction. 
B)  In this reaction, hydrogen is oxidized. 
C)  In this reaction, sulfur is oxidized. 
D)  In this reaction, cadmium is oxidized. 
E)  In this reaction, oxygen is oxidized. 
A)  This reaction is an acid-base reaction. 
B)  In this reaction, hydrogen is oxidized. 
C)  In this reaction, sulfur is oxidized. 
D)  In this reaction, cadmium is oxidized. 
E)  In this reaction, oxygen is oxidized.

Question 8

During a titration, it is found that 53.5 mL of a solution of NaOH is needed to neutralize a solution that contains 1.86 g of HCl. What is the concentration of the NaOH solution?

Accepted Answer

A)  0.051 M 
B)  0.686 M 
C)  1.05 M 
D)  0.035 M 
E)  0.953 M 
A)  0.051 M 
B)  0.686 M 
C)  1.05 M 
D)  0.035 M 
E)  0.953 M

Question 9

Which of these compounds is a nonelectrolyte?

Accepted Answer

A)  NaOH 
B)  HNO3 
C)  C2H6O (ethanol) 
D)  KF 
E)  CH3COOH (acetic acid) 
A)  NaOH 
B)  HNO3 
C)  C2H6O (ethanol) 
D)  KF 
E)  CH3COOH (acetic acid)

Question 10

Which one of the following substances is the strongest electrolyte?

Accepted Answer

A)  CO 
B)  CH3Cl 
C)  CH4 
D)  C2H5OH 
E)  HCl 
A)  CO 
B)  CH3Cl 
C)  CH4 
D)  C2H5OH 
E)  HCl

Question 11

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

Accepted Answer

A)  Hg2Cl2 
B)  Na2S 
C)  Ag2CO3 
D)  Ag2S 
E)  BaCO3 
A)  Hg2Cl2 
B)  Na2S 
C)  Ag2CO3 
D)  Ag2S 
E)  BaCO3

Question 12

Identify the major ions present in an aqueous HNO3 solution.

Accepted Answer

A)  HN2+, O2- 
B)  OH-, NO3- 
C)  OH-, NO+ 
D)  H+, N3-, O2- 
E)  H+, NO3- 
A)  HN2+, O2- 
B)  OH-, NO3- 
C)  OH-, NO+ 
D)  H+, N3-, O2- 
E)  H+, NO3-

Question 13

Which is present in all aqueous Brønsted acid solutions?

Accepted Answer

A)  H2 
B)  H+ 
C)  OH- 
D)  H2SO4 
E)  Cl- 
A)  H2 
B)  H+ 
C)  OH- 
D)  H2SO4 
E)  Cl-

Question 14

Which of the following equations is not a redox reaction?

Accepted Answer

A)  2H2(g) + O2(g) → 2H2O(l) 
B)  Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) 
C)  H2O(l) + NH3(g) → NH4+(aq) + OH-(aq) 
D)  6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l) 
E)  Cl2(g) + 2KBr(aq) → Br2(aq) + 2KCl(aq) 
A)  2H2(g) + O2(g) → 2H2O(l) 
B)  Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) 
C)  H2O(l) + NH3(g) → NH4+(aq) + OH-(aq) 
D)  6FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l) 
E)  Cl2(g) + 2KBr(aq) → Br2(aq) + 2KCl(aq)

Question 15

________ is a concentration unit that is defined as the number of moles of solute per liters of solution.

Accepted Answer

The answer of ________ is a concentration unit that is...

Question 16

Which of these equations does not represent an oxidation-reduction reaction?

Accepted Answer

A)  3Al + 6HCl → 3H2 + AlCl3 
B)  2H2O → 2H2 + O2 
C)  2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3 
D)  2NaI + Br2 → 2NaBr + I2 
E)  Cu(NO3)2 + Zn → Zn(NO3)2 + Cu 
A)  3Al + 6HCl → 3H2 + AlCl3 
B)  2H2O → 2H2 + O2 
C)  2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3 
D)  2NaI + Br2 → 2NaBr + I2 
E)  Cu(NO3)2 + Zn → Zn(NO3)2 + Cu

Question 17

H3O+ is called the ________ ________.

Accepted Answer

Question 18

A(n) ________ ________ has two or more ionizable hydrogen atoms.

Accepted Answer

The answer of A(n) ________ ________ has two or more...

Question 19

What is the molarity of 250 mL of a solution containing 5.9 g of sodium chloride?

Accepted Answer

The answer of What is the molarity of 250 mL...

Question 20

Vinegar is a solution of acetic acid, HC2H3O2, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Accepted Answer

A)  0.0543% 
B)  1.08% 
C)  3.26% 
D)  5.43% 
E)  9.23% 
A)  0.0543% 
B)  1.08% 
C)  3.26% 
D)  5.43% 
E)  9.23%

Exam 4: Reactions in Aqueous Solutions

Which balanced chemical equation could represent the following result of a precipitation reaction?

Which salt is formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

OH- is called the ________ ________.

A 250-mL sample of 0.0328 M HCl is partially neutralized by the addition of 100. mL of 0.0245 M NaOH. Find the concentration of hydrochloric acid in the resulting solution.

Which of these chemical equations describes a precipitation reaction?

Which is a correct description of the following reaction? H2SO4 + Cd(OH)2 → 2H2O + CdSO4

During a titration, it is found that 53.5 mL of a solution of NaOH is needed to neutralize a solution that contains 1.86 g of HCl. What is the concentration of the NaOH solution?

Which of these compounds is a nonelectrolyte?

Which one of the following substances is the strongest electrolyte?

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

Identify the major ions present in an aqueous HNO3 solution.

Which is present in all aqueous Brønsted acid solutions?

Which of the following equations is not a redox reaction?

________ is a concentration unit that is defined as the number of moles of solute per liters of solution.

Which of these equations does not represent an oxidation-reduction reaction?

H3O+ is called the ________ ________.

A(n) ________ ________ has two or more ionizable hydrogen atoms.

What is the molarity of 250 mL of a solution containing 5.9 g of sodium chloride?

Vinegar is a solution of acetic acid, HC2H3O2, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

OH^- is called the .

Which is a correct description of the following reaction? H₂SO₄ + Cd(OH)₂→ 2H₂O + CdSO₄

Identify the major ions present in an aqueous HNO₃solution.

H₃O⁺ is called the .

A(n) has two or more ionizable hydrogen atoms.

Vinegar is a solution of acetic acid, HC₂H₃O₂, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?