Question 1

Choose the INCORRECT statement about the electron configuration of transition elements.

Accepted Answer

A) Cu: [Ar]3d104s1  
B) Fe: [Ar]3d64s2  
C) Cr: [Ar]3d44s2  
D) V: [Ar]3d34s2  
E) Zn: [Ar]3d104s2  
A) Cu: [Ar]3d104s1  
B) Fe: [Ar]3d64s2  
C) Cr: [Ar]3d44s2  
D) V: [Ar]3d34s2  
E) Zn: [Ar]3d104s2

Question 2

Choose the INCORRECT statement about metallurgy.

Accepted Answer

A) Extractive metallurgy is the removal of metals from their ores. 
B) Concentration is the separation of ore from waste rock. 
C) One method of concentration is flotation. 
D) Roasting converts an ore to its sulfide. 
E) Roasting involves heating the ore to a high temperature. 
A) Extractive metallurgy is the removal of metals from their ores. 
B) Concentration is the separation of ore from waste rock. 
C) One method of concentration is flotation. 
D) Roasting converts an ore to its sulfide. 
E) Roasting involves heating the ore to a high temperature.

Question 3

Choose the INCORRECT statement.

Accepted Answer

A) Cu,Ag,and Au are the preferred metals for coins because they are durable and resistant to corrosion. 
B) Cu,Ag,and Au are used in the electronics industry because of their conductivity. 
C) Cu,Ag,and Au do not readily react with HCl although most metals do. 
D) Tarnish is black Ag2S. 
E) Silver is the basis for the world's monetary reserve. 
A) Cu,Ag,and Au are the preferred metals for coins because they are durable and resistant to corrosion. 
B) Cu,Ag,and Au are used in the electronics industry because of their conductivity. 
C) Cu,Ag,and Au do not readily react with HCl although most metals do. 
D) Tarnish is black Ag2S. 
E) Silver is the basis for the world's monetary reserve.

Question 4

Choose the INCORRECT statement about transition elements.

Accepted Answer

A) Ferromagnetism occurs only in elements with paired electrons. 
B) Ferromagnetism is unique to Fe,Co and Ni. 
C) Ferromagnetism occurs due to atoms combining in the solid state in domains. 
D) Paramagnetism is due to unpaired electrons. 
E) Ferromagnetism requires that interatomic distances be of the right magnitude to generate domains. 
A) Ferromagnetism occurs only in elements with paired electrons. 
B) Ferromagnetism is unique to Fe,Co and Ni. 
C) Ferromagnetism occurs due to atoms combining in the solid state in domains. 
D) Paramagnetism is due to unpaired electrons. 
E) Ferromagnetism requires that interatomic distances be of the right magnitude to generate domains.

Question 5

List the following in order of increasing number of unpaired electrons: Fe,V,Sc,Mn

Accepted Answer

A) Mn < Fe < V < Sc 
B) Sc < V < Fe < Mn 
C) Fe < V < Sc < Mn 
D) V < Sc < Mn < Fe 
E) Sc < Mn < Fe < V 
A) Mn < Fe < V < Sc 
B) Sc < V < Fe < Mn 
C) Fe < V < Sc < Mn 
D) V < Sc < Mn < Fe 
E) Sc < Mn < Fe < V

Question 6

If an aqueous solution is prepared by dissolving 1.6 mol Na2CrO4 in 1.0 L of a buffer at pH 8.24,what will be [Cr2O72-] in the solution? The resultant equilibria are:
HCrO4-(aq)⇌ H+(aq)+ CrO42-(aq)Ka = 3.2 × 10-7
2 HCrO4-(aq)⇌ Cr2O72-(aq)+ H2O(l)K = 33

Accepted Answer

A) 9.9 × 10-5 M 
B) 2.9 × 10-28 M 
C) 8.9 × 10-9 M 
D) 8.6 × 102 M 
E) 2.8 × 10-2 M 
A) 9.9 × 10-5 M 
B) 2.9 × 10-28 M 
C) 8.9 × 10-9 M 
D) 8.6 × 102 M 
E) 2.8 × 10-2 M

Question 7

Write the electron configuration for Co3+.

Accepted Answer

A) [Ar]3d6  
B) [Ar]4s23d4  
C) [Ar]4s24p4  
D) [Ar]4s14p1  
E) [Ar]5s2  
A) [Ar]3d6  
B) [Ar]4s23d4  
C) [Ar]4s24p4  
D) [Ar]4s14p1  
E) [Ar]5s2

Question 8

Which of the following represents a disproportionation reaction?

Accepted Answer

A) 2 Cu+(aq)+ H2O(l)→ Cu(s)+ CuO(s)+ 2 H+(aq) 
B) 2 CrO42-(aq)+ 2 H+(aq)→ Cr2O72-(aq)+ H2O(aq) 
C) TiCl4(l)+ 2 H2O(l)→ TiO2(s)+ 4 HCl(g) 
D) MnO4-(aq)+ 5 VO2+(aq)+ H2O(l)→ Mn2+(aq)+ 5 VO2+(aq)+ 2 H+(aq) 
E) 3MnO2(s)+ 6 KOH(aq)+ KClO3(aq)   3 K2MnO4(aq)+ KCl(aq)+ 3 H2O(l) 
A) 2 Cu+(aq)+ H2O(l)→ Cu(s)+ CuO(s)+ 2 H+(aq) 
B) 2 CrO42-(aq)+ 2 H+(aq)→ Cr2O72-(aq)+ H2O(aq) 
C) TiCl4(l)+ 2 H2O(l)→ TiO2(s)+ 4 HCl(g) 
D) MnO4-(aq)+ 5 VO2+(aq)+ H2O(l)→ Mn2+(aq)+ 5 VO2+(aq)+ 2 H+(aq) 
E) 3MnO2(s)+ 6 KOH(aq)+ KClO3(aq)   3 K2MnO4(aq)+ KCl(aq)+ 3 H2O(l)

Choose the INCORRECT statement about the electron configuration of transition elements.

Choose the INCORRECT statement about metallurgy.

Choose the INCORRECT statement.

Choose the INCORRECT statement about transition elements.

List the following in order of increasing number of unpaired electrons: Fe,V,Sc,Mn

If an aqueous solution is prepared by dissolving 1.6 mol Na₂CrO₄ in 1.0 L of a buffer at pH 8.24,what will be [Cr₂O₇^2-] in the solution? The resultant equilibria are: HCrO₄^-(aq)⇌ H⁺(aq)+ CrO₄^2-(aq)K_a = 3.2 × 10^-7 2 HCrO₄^-(aq)⇌ Cr₂O₇^2-(aq)+ H₂O(l)K = 33

Write the electron configuration for Co³⁺.

Which of the following represents a disproportionation reaction?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Exam 23: The Transition Elements

Choose the INCORRECT statement about the electron configuration of transition elements.

Choose the INCORRECT statement about metallurgy.

Choose the INCORRECT statement.

Choose the INCORRECT statement about transition elements.

List the following in order of increasing number of unpaired electrons: Fe,V,Sc,Mn

If an aqueous solution is prepared by dissolving 1.6 mol Na2CrO4 in 1.0 L of a buffer at pH 8.24,what will be [Cr2O72-] in the solution? The resultant equilibria are: HCrO4-(aq)⇌ H+(aq)+ CrO42-(aq)Ka = 3.2 × 10-7 2 HCrO4-(aq)⇌ Cr2O72-(aq)+ H2O(l)K = 33

Write the electron configuration for Co3+.

Which of the following represents a disproportionation reaction?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

If an aqueous solution is prepared by dissolving 1.6 mol Na₂CrO₄ in 1.0 L of a buffer at pH 8.24,what will be [Cr₂O₇^2-] in the solution? The resultant equilibria are: HCrO₄^-(aq)⇌ H⁺(aq)+ CrO₄^2-(aq)K_a = 3.2 × 10^-7 2 HCrO₄^-(aq)⇌ Cr₂O₇^2-(aq)+ H₂O(l)K = 33

Write the electron configuration for Co³⁺.