Question 1

Hydrogen is oxidized in the following chemical reaction.
H2 + Cl2 $\rarr$ 2HCl

Accepted Answer

A) True 
 B)False

Question 2

The oxidation number of Fe in K3Fe(CN)6 is

Accepted Answer

A) +3 
B) +2 
C) +1 
D) -3 
E) -4 
A) +3 
B) +2 
C) +1 
D) -3 
E) -4

Question 3

What type of reaction is the following? 
C2H4(g)+ 3 O2(g)$\rarr$ 2 CO2(g)+ 2 H2O(g)

Accepted Answer

A) Combination reaction 
B) Acid-base neutralization reaction 
C) Hydrogen displacement reaction 
D) Disproportionation reaction 
E) Combustion reaction 
A) Combination reaction 
B) Acid-base neutralization reaction 
C) Hydrogen displacement reaction 
D) Disproportionation reaction 
E) Combustion reaction

Question 4

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl2 solution?

Accepted Answer

Question 5

Which of the following represents a combustion reaction?

Accepted Answer

A) 2C2H6(g)+ 7O2(g)$\rarr$4CO2(g)+ 6H2O(l) 
B) LiOH(aq)+ HNO3(aq) $\rarr$LiNO3(aq)+ H2O(l) 
C) N2(g)+ 3H2(g)$\rarr$ 2NH3(g) 
D) 2Na(s)+ 2H2O(l)$\rarr$2NaOH(aq)+ H2(g) 
E) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g) 
A) 2C2H6(g)+ 7O2(g)$\rarr$4CO2(g)+ 6H2O(l) 
B) LiOH(aq)+ HNO3(aq) $\rarr$LiNO3(aq)+ H2O(l) 
C) N2(g)+ 3H2(g)$\rarr$ 2NH3(g) 
D) 2Na(s)+ 2H2O(l)$\rarr$2NaOH(aq)+ H2(g) 
E) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g)

Question 6

Which of the following compounds is a strong electrolyte?

Accepted Answer

A) H2O 
B) CH3OH 
C) CH3CH2OH 
D) HF 
E) NaF 
A) H2O 
B) CH3OH 
C) CH3CH2OH 
D) HF 
E) NaF

Question 7

The oxidation number of N in NO is +7.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) AgBr 
B) AgCl 
C) Ag2CO3 
D) AgNO3 
E) Ag2S 
A) AgBr 
B) AgCl 
C) Ag2CO3 
D) AgNO3 
E) Ag2S

Question 9

A piece of zinc metal was added to an aqueous solution of lead(II)nitrate.After some time it was observed that the zinc metal appeared to fall apart and a solid had accumulated at the bottom of the reaction vessel.
Write the balanced chemical equation for this reaction.

Accepted Answer

Zn(s)+ Pb(

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Question 12

Write the net ionic equation for reaction that occurs when aqueous iron(III)sulfate is added to aqueous sodium sulfide to produce solid iron(III)sulfide and aqueous sodium sulfate.

Accepted Answer

2Fe³⁺(aq)+ 3

Question 13

How many total electrons are transferred in the following reaction? 
2Na(s)+ Cl2(g)$\rarr$2NaCl(s)

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 14

A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

Accepted Answer

A) 9.19 × 10-3 M 
B) 2.30 × 10-3 M 
C) 2.72 × 10-3 M 
D) 4.59 × 10-3 M 
E) 1.25 × 10-3 M 
A) 9.19 × 10-3 M 
B) 2.30 × 10-3 M 
C) 2.72 × 10-3 M 
D) 4.59 × 10-3 M 
E) 1.25 × 10-3 M

Question 15

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

Accepted Answer

A) Hg2Cl2 
B) Na2S 
C) Ag2CO3 
D) Ag2S 
E) BaSO4 
A) Hg2Cl2 
B) Na2S 
C) Ag2CO3 
D) Ag2S 
E) BaSO4

Question 16

Write the balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO3)2(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Accepted Answer

Molecular equation: 2Al(s)+ 3C

Question 17

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

Question 18

The highest possible oxidation number of carbon is

Accepted Answer

A) +8 
B) +6 
C) +4 
D) +2 
E) -4 
A) +8 
B) +6 
C) +4 
D) +2 
E) -4

Question 19

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

Accepted Answer

Question 20

Identify the precipitate(s)formed when solutions of Ca(ClO4)2(aq), K2CO3(aq), and NaNO3(aq)are mixed.

Accepted Answer

A) CaCO3 
B) Na2CO3 
C) Ca(NO3)2 and NaClO4 
D) CaCO3 and Na2CO3 
E) KClO4 and Ca(NO3)2 
A) CaCO3 
B) Na2CO3 
C) Ca(NO3)2 and NaClO4 
D) CaCO3 and Na2CO3 
E) KClO4 and Ca(NO3)2

Exam 4: Reactions in Aqueous Solutions

Hydrogen is oxidized in the following chemical reaction. H2 + Cl2 →\rarr→ 2HCl

The oxidation number of Fe in K3Fe(CN)6 is

What type of reaction is the following? C2H4(g)+ 3 O2(g) →\rarr→ 2 CO2(g)+ 2 H2O(g)

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl2 solution?

Which of the following represents a combustion reaction?

Which of the following compounds is a strong electrolyte?

The oxidation number of N in NO is +7.

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

A piece of zinc metal was added to an aqueous solution of lead(II)nitrate.After some time it was observed that the zinc metal appeared to fall apart and a solid had accumulated at the bottom of the reaction vessel. Write the balanced chemical equation for this reaction.

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

Write the net ionic equation for reaction that occurs when aqueous iron(III)sulfate is added to aqueous sodium sulfide to produce solid iron(III)sulfide and aqueous sodium sulfate.

How many total electrons are transferred in the following reaction? 2Na(s)+ Cl2(g) →\rarr→ 2NaCl(s)

A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

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

Write the balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO3)2(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

Which of the following compounds is a weak acid?

The highest possible oxidation number of carbon is

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

Identify the precipitate(s)formed when solutions of Ca(ClO4)2(aq), K2CO3(aq), and NaNO3(aq)are mixed.

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Gases

Thermochemistry

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

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Hydrogen is oxidized in the following chemical reaction. H₂ + Cl₂ $\rarr$ 2HCl

The oxidation number of Fe in K₃Fe(CN)₆ is

What type of reaction is the following? C₂H₄(g)+ 3 O₂(g) $\rarr$ 2 CO₂(g)+ 2 H₂O(g)

What is the molar concentration of chloride ions in a solution prepared by mixing 100.mL of 2.0 M KCl with 50.mL of a 1.5 M CaCl₂ solution?

How many total electrons are transferred in the following reaction? 2Na(s)+ Cl₂(g) $\rarr$ 2NaCl(s)

A 0.9182 g sample of CaBr₂ is dissolved in enough water to give 500.mL of solution.What is the calcium ion concentration in this solution?

Write the balanced molecular and net ionic equations for the reaction that would occur between Al(s)and Co(NO₃)₂(aq).Be sure to include the correct states in your final equations.If no reaction is expected, write "no reaction."

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

Identify the precipitate(s)formed when solutions of Ca(ClO₄)₂(aq), K₂CO₃(aq), and NaNO₃(aq)are mixed.