Question 1

Which of the following coordination numbers applies to octahedral complexes?

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  8 
E)  none of the above 
A)  4 
B)  5 
C)  6 
D)  8 
E)  none of the above

Question 2

Iron(III) forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  7 
E)  none of the above 
A)  1 
B)  3 
C)  5 
D)  7 
E)  none of the above

Question 3

Write the formula for pentaamminechlorocobalt(III) chloride.

Accepted Answer

A)  [Co(NH3)5Cl]Cl 
B)  [Co(NH3)5Cl]Cl2 
C)  [Co(NH3)5Cl]Cl3 
D)  [Co(NH3)5Cl]Cl4 
E)  none of the above 
A)  [Co(NH3)5Cl]Cl 
B)  [Co(NH3)5Cl]Cl2 
C)  [Co(NH3)5Cl]Cl3 
D)  [Co(NH3)5Cl]Cl4 
E)  none of the above

Question 4

What is the difference between a coordination compound and a complex ion?

Accepted Answer

A coordination compound genera

Question 5

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Accepted Answer

A) True 
 B)False

Question 6

Mercury(II) compounds are assimilated into the food chain because

Accepted Answer

A)  they are ionic substances that are concentrated in cell tissue. 
B)  they complex with compounds in the blood which carries them to the muscle tissue of organisms. 
C)  they are incorporated into bone structure. 
D)  they are very soluble in water and easily ingested. 
E)  they are nonpolar substances that are concentrated in fatty tissues as they move up the food chain. 
A)  they are ionic substances that are concentrated in cell tissue. 
B)  they complex with compounds in the blood which carries them to the muscle tissue of organisms. 
C)  they are incorporated into bone structure. 
D)  they are very soluble in water and easily ingested. 
E)  they are nonpolar substances that are concentrated in fatty tissues as they move up the food chain.

Question 7

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

Accepted Answer

A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4. 
A)  2 and 6. 
B)  4 and 6. 
C)  6 and 6. 
D)  2 and 4. 
E)  4 and 4.

Question 8

Which of the following transition elements can achieve the largest oxidation number?

Accepted Answer

A)  chromium, Cr, Group 6B(6) 
B)  manganese, Mn, Group 7B(7) 
C)  iron, Fe, Group 8B(8) 
D)  cobalt, Co, Group 8B(9) 
E)  zinc, Zn, Group 2B(12) 
A)  chromium, Cr, Group 6B(6) 
B)  manganese, Mn, Group 7B(7) 
C)  iron, Fe, Group 8B(8) 
D)  cobalt, Co, Group 8B(9) 
E)  zinc, Zn, Group 2B(12)

Question 9

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are, respectively:

Accepted Answer

A)  -1 and 4. 
B)  -1 and 6. 
C)  3 and 4. 
D)  3 and 6. 
E)  1 and 6. 
A)  -1 and 4. 
B)  -1 and 6. 
C)  3 and 4. 
D)  3 and 6. 
E)  1 and 6.

Question 10

The maximum oxidation state of an element in the first transition series never exceeds its group number.

Accepted Answer

A) True 
 B)False

Question 11

a. How can the formation of a complex ion be described in terms of a theory of acids and bases?
b. What is the essential requirement for a molecule or ion to act as a ligand?

Accepted Answer

a. According to Lewis, in an acid-base r

Question 12

In complexes of transition metals, the maximum coordination number of the metal is equal to its number of d electrons.

Accepted Answer

A) True 
 B)False

Which of the following coordination numbers applies to octahedral complexes?

Iron(III) forms an octahedral complex with the ligand CN^-. How many unpaired electrons are in the d orbitals of iron?

Write the formula for pentaamminechlorocobalt(III) chloride.

What is the difference between a coordination compound and a complex ion?

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Mercury(II) compounds are assimilated into the food chain because

In the compound [Ni(en)₂(H₂O)₂]SO₄ (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

Which of the following transition elements can achieve the largest oxidation number?

In the compound K[Co(C₂O₄)₂(H₂O)₂] (where C₂O₄^2- = oxalate) the oxidation number and coordination number of cobalt are, respectively:

The maximum oxidation state of an element in the first transition series never exceeds its group number.

a. How can the formation of a complex ion be described in terms of a theory of acids and bases? b. What is the essential requirement for a molecule or ion to act as a ligand?

In complexes of transition metals, the maximum coordination number of the metal is equal to its number of d electrons.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Nuclear Reactions and Their Applications

Filters

Exam 23: The Transition Elements and Their Coordination Compounds

Which of the following coordination numbers applies to octahedral complexes?

Iron(III) forms an octahedral complex with the ligand CN-. How many unpaired electrons are in the d orbitals of iron?

Write the formula for pentaamminechlorocobalt(III) chloride.

What is the difference between a coordination compound and a complex ion?

The ground state electron configuration of a transition element atom cannot have more than one incomplete subshell.

Mercury(II) compounds are assimilated into the food chain because

In the compound [Ni(en)2(H2O)2]SO4 (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

Which of the following transition elements can achieve the largest oxidation number?

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate) the oxidation number and coordination number of cobalt are, respectively:

The maximum oxidation state of an element in the first transition series never exceeds its group number.

a. How can the formation of a complex ion be described in terms of a theory of acids and bases? b. What is the essential requirement for a molecule or ion to act as a ligand?

In complexes of transition metals, the maximum coordination number of the metal is equal to its number of d electrons.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Nuclear Reactions and Their Applications

Filters

Iron(III) forms an octahedral complex with the ligand CN^-. How many unpaired electrons are in the d orbitals of iron?

In the compound [Ni(en)₂(H₂O)₂]SO₄ (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively:

In the compound K[Co(C₂O₄)₂(H₂O)₂] (where C₂O₄^2- = oxalate) the oxidation number and coordination number of cobalt are, respectively: