Question 1

Why is the +2 oxidation state so common among transition elements?

Accepted Answer

The outermost (ns²) electrons are easily lost, producing the +2 oxidation state.

Question 2

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  False

Question 3

Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

Accepted Answer

A) True 
 B)False  True

Question 4

How many unpaired electrons will there be in a high-spin octahedral complex of Fe(II)?

Accepted Answer

A)  0 
B)  2 
C)  4 
D)  6 
E)  None of these choices is correct. 
A)  0 
B)  2 
C)  4 
D)  6 
E)  None of these choices is correct.

Question 5

Give the systematic name for [Cu(NH3)4]Cl2.

Accepted Answer

A)  dichlorotetraamminecuprate(II) 
B)  tetraamminecopper(II) chloride 
C)  copper(II) ammonium chloride 
D)  tetraaminocopper(II) chloride 
E)  None of these choices is correct. 
A)  dichlorotetraamminecuprate(II) 
B)  tetraamminecopper(II) chloride 
C)  copper(II) ammonium chloride 
D)  tetraaminocopper(II) chloride 
E)  None of these choices is correct.

Question 6

Which of the following coordination numbers applies to octahedral complexes?

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  8 
E)  None of these choices is correct. 
A)  4 
B)  5 
C)  6 
D)  8 
E)  None of these choices is correct.

Question 7

The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively:

Accepted Answer

A)  2 and 6. 
B)  2 and 8. 
C)  3 and 6. 
D)  3 and 8. 
E)  None of these choices is correct. 
A)  2 and 6. 
B)  2 and 8. 
C)  3 and 6. 
D)  3 and 8. 
E)  None of these choices is correct.

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The compound K3[Fe(CN)6] is used in calico printing and wool dyeing. Give its systematic name.

Accepted Answer

A)  potassium iron(III) hexacyanate 
B)  tripotassium iron(III) hexacyanate 
C)  potassium hexacyanoferrate(III) 
D)  potassium hexacyanideferrate 
E)  None of these choices is correct. 
A)  potassium iron(III) hexacyanate 
B)  tripotassium iron(III) hexacyanate 
C)  potassium hexacyanoferrate(III) 
D)  potassium hexacyanideferrate 
E)  None of these choices is correct.

Question 10

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 11

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 these choices is correct. 
A)  [Co(NH3)5Cl]Cl 
B)  [Co(NH3)5Cl]Cl2 
C)  [Co(NH3)5Cl]Cl3 
D)  [Co(NH3)5Cl]Cl4 
E)  None of these choices is correct.

Question 12

The compound Rh(CO)(H)(PH3)2 forms cis and trans isomers. Use this information to predict the geometry of this complex, and draw the geometric isomers.

Accepted Answer

The complex has four ligands a

Question 13

Square planar complexes can exhibit both geometric and optical isomerism.

Accepted Answer

A) True 
 B)False

Question 14

The ground state electronic configuration of Zn2+ is:

Accepted Answer

A)  [Ar]4s23d8 
B)  [Ar]4s23d10 
C)  [Ar]4s13d9 
D)  [Ar]3d10 
E)  [Ar]3d8 
A)  [Ar]4s23d8 
B)  [Ar]4s23d10 
C)  [Ar]4s13d9 
D)  [Ar]3d10 
E)  [Ar]3d8

Question 15

Give the systematic name for Cr(CO)3(NH3)3.

Accepted Answer

A)  chromiumtriaminotricarbonyl 
B)  triamminechromium carbonate 
C)  triamminetricarbonylchromate(0) 
D)  triamminetricarbonylchromium(0) 
E)  None of these choices is correct. 
A)  chromiumtriaminotricarbonyl 
B)  triamminechromium carbonate 
C)  triamminetricarbonylchromate(0) 
D)  triamminetricarbonylchromium(0) 
E)  None of these choices is correct.

Question 16

Which of the oxidation states of chromium has the largest valence-state electronegativity?

Accepted Answer

A)  chromium(0) 
B)  chromium(II) 
C)  chromium(III) 
D)  chromium(IV) 
E)  chromium(VI) 
A)  chromium(0) 
B)  chromium(II) 
C)  chromium(III) 
D)  chromium(IV) 
E)  chromium(VI)

Question 17

When the ethylenediaminetetraacetate ion (EDTA4¯) forms a complex with a transition metal ion, how many electrons does it normally donate to the metal?

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  10 
E)  12 
A)  4 
B)  6 
C)  8 
D)  10 
E)  12

Question 18

What is the highest possible oxidation state for palladium, Pd?

Accepted Answer

A)  +1 
B)  +2 
C)  +3 
D)  +4 
E)  +6 
A)  +1 
B)  +2 
C)  +3 
D)  +4 
E)  +6

Question 19

The conversion of the chromate ion (CrO42¯) to the dichromate ion (Cr2O72¯) is a redox process.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following species could exist as isomers?

Accepted Answer

A)  [Co(H2O)4Cl2]+ 
B)  [Pt(NH3)Br3]¯ 
C)  [Pt(en)Cl2] 
D)  [Pt(NH3)3Cl]+ 
E)  None of these choices is correct. 
A)  [Co(H2O)4Cl2]+ 
B)  [Pt(NH3)Br3]¯ 
C)  [Pt(en)Cl2] 
D)  [Pt(NH3)3Cl]+ 
E)  None of these choices is correct.

Exam 23: The Transition Elements and Their Coordination Compounds

Why is the +2 oxidation state so common among transition elements?

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

Valence Bond theory rationalizes octahedral geometry by assuming a d2sp3 hybridization pattern.

How many unpaired electrons will there be in a high-spin octahedral complex of Fe(II)?

Give the systematic name for [Cu(NH3)4]Cl2.

Which of the following coordination numbers applies to octahedral complexes?

The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively:

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

The compound K3[Fe(CN)6] is used in calico printing and wool dyeing. Give its systematic name.

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

Write the formula for pentaamminechlorocobalt(III) chloride.

The compound Rh(CO)(H)(PH3)2 forms cis and trans isomers. Use this information to predict the geometry of this complex, and draw the geometric isomers.

Square planar complexes can exhibit both geometric and optical isomerism.

The ground state electronic configuration of Zn2+ is:

Give the systematic name for Cr(CO)3(NH3)3.

Which of the oxidation states of chromium has the largest valence-state electronegativity?

When the ethylenediaminetetraacetate ion (EDTA4¯) forms a complex with a transition metal ion, how many electrons does it normally donate to the metal?

What is the highest possible oxidation state for palladium, Pd?

The conversion of the chromate ion (CrO42¯) to the dichromate ion (Cr2O72¯) is a redox process.

Which of the following species could exist as isomers?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three 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

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

Valence Bond theory rationalizes octahedral geometry by assuming a d²sp³ hybridization pattern.

Give the systematic name for [Cu(NH₃)₄]Cl₂.

The oxidation and coordination numbers of cobalt in the compound [Co(NH₃)₅Cl]Cl₂ are, respectively:

The compound K₃[Fe(CN)₆] is used in calico printing and wool dyeing. Give its systematic name.

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

The compound Rh(CO)(H)(PH₃)₂ forms cis and trans isomers. Use this information to predict the geometry of this complex, and draw the geometric isomers.

The ground state electronic configuration of Zn²⁺ is:

Give the systematic name for Cr(CO)₃(NH₃)₃.

When the ethylenediaminetetraacetate ion (EDTA⁴¯) forms a complex with a transition metal ion, how many electrons does it normally donate to the metal?

The conversion of the chromate ion (CrO₄²¯) to the dichromate ion (Cr₂O₇²¯) is a redox process.