Question 1

How many unpaired electrons are found in each of the following complex ions?
-[Cr(CN)4]2-

Accepted Answer

Question 2

What is the formula for the hexaaquachromium(II) ion?

Accepted Answer

A)  [Cr(H2O) 6]2+
B)  [Cr2(H2O) 6]4+
C)  [Cr(H2O) 4]2+
D)  [Cr2(H2O) 6]2+
E)  [Cr(H2O) 6]4-

Question 3

A coordination compound of Cu2+ can be described as Cu(NH3) xSO4 and is known to contain 29.92% NH3 by mass.The value of x is:

Accepted Answer

A)  2
B)  3
C)  4
D)  6
E)  none of these

Question 4

The complexes of Zn2+ are all diamagnetic.

Accepted Answer

A) True 
 B)False

Question 5

In the crystal field model,ligands are treated as negative point charges.

Accepted Answer

A) True 
 B)False

Question 6

In which of the following complexes does the transition metal have a d8 configuration?

Accepted Answer

A)  PtCl42-
B)  Cu(H2O) 62+
C)  Ni(CO) 4
D)  Zn(NH3) 42+
E)  Fe(CN) 63-

Question 7

The empirical formula of a compound with a mass percent composition of 6.78% H,31.43% N,39.76% Cl,and 22.03% Co is consistent with which of the following complexes?

Accepted Answer

A)  [Co(NH3) 3Cl3]
B)  [Co(NH3) 4Cl2]Cl
C)  [Co(NH3) 5Cl]Cl2
D)  [Co(NH3) 6]Cl3
E)  none of these

Question 8

Which of the following is paramagnetic?

Accepted Answer

A)  Zn(H2O) 62+
B)  Co(NH3) 63+ (strong field) 
C)  Cu(CN) 32-
D)  Mn(CN) 62- (strong field) 
E)  none of these

Question 9

Which of the following ligands might give linkage isomers?

Accepted Answer

A)  NO2-
B)  SCN-
C)  H2NHC2CH2NH2
D)  A and B
E)  A,B,and C

Question 10

For the process Co(NH3) 5Cl2+ + Cl-  →	o→  Co(NH3) 4Cl2+ + NH3 what would be the ratio of cis to trans isomer in the product?

Accepted Answer

A)  1 : 1
B)  1 : 2
C)  1 : 4
D)  4 : 1
E)  2 : 1

Question 11

Ni(NH3)  62+

Accepted Answer

A)  0
B)  1
C)  2
D)  4
E)  5

Question 12

Which of the following is a d7 ion?

Accepted Answer

A)  Co(II) 
B)  Cu(II) 
C)  Mn(II) 
D)  Mn(IV) 
E)  At least two of the above (a-d) are d7 ions.

Question 13

The metals with the highest ionization energies are most likely to be found in nature in the elemental state.

Accepted Answer

A) True 
 B)False

Question 14

Oxygen is stored in mammalian tissue in which type of molecule?

Accepted Answer

A)  hemoglobin
B)  myoglobin
C)  chlorophyll
D)  cytochrome
E)  prophyrin

Question 15

Which of the following is true about coordination complexes?

Accepted Answer

A)  The metal is a Lewis base and the ligands are Lewis acids.
B)  Only complexes with coordination number six are found in nature.
C)  When the ligands approach a transition metal ion in an octahedral field,the dxz,dyz,and dxy atomic orbitals are affected the least by the ligands.
D)  None of the above is true.
E)  All of the above are true.

Question 16

What is the correct IUPAC name for [AuCl4(H2O) 2]-?

Accepted Answer

A)  diaquatetrachloroaurate(0) ion
B)  diaquatetrachloroaurate(III) ion
C)  diaquatetrachloroaurate(I) ion
D)  diaquatetrachlorogold(III) ion
E)  diaquatetrachlorogold(I) ion

Question 17

How many of the following compounds exhibit geometric isomers?
I.Pt(NH3) 2Cl2 (square planar) 
II.[Co(H2O) 2]Cl3
III.Ni(NH3) 4(NO2) 2
IV.K2[CoCl4]

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4

Question 18

The 3d electrons in Co(NH3)63+ are all paired but Fe(H2O)63+ has unpaired electrons (is paramagnetic).Explain.

Accepted Answer

Both complex ions have six 3d electrons....

Question 19

Which of the transition metals is the best conductor of heat and electric current?

Accepted Answer

A)  copper
B)  silver
C)  gold
D)  tungsten
E)  titanium

Question 20

Here are some crystal field representations of d electrons in an octahedral complex:
I)  2) 63+ (assume weak field)  A) representation I B) representation II C) representation III D) representation IV E) representation V" class="answers-bank-image d-inline" rel="preload" > II)  2) 63+ (assume weak field)  A) representation I B) representation II C) representation III D) representation IV E) representation V" class="answers-bank-image d-inline" rel="preload" > III)  2) 63+ (assume weak field)  A) representation I B) representation II C) representation III D) representation IV E) representation V" class="answers-bank-image d-inline" rel="preload" > IV)  2) 63+ (assume weak field)  A) representation I B) representation II C) representation III D) representation IV E) representation V" class="answers-bank-image d-inline" rel="preload" > V)  2) 63+ (assume weak field)  A) representation I B) representation II C) representation III D) representation IV E) representation V" class="answers-bank-image d-inline" rel="preload" > Choose the representation that fits the transition metal atom in the following species:
-Fe(OH2) 63+ (assume weak field)

Accepted Answer

A)  representation I
B)  representation II
C)  representation III
D)  representation IV
E)  representation V

Exam 21: Transition Metals and Coordination Chemistry

What is the correct IUPAC name for [AuCl4(H2O) 2]-?

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Oxygen is stored in mammalian tissue in which type of molecule?

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How many unpaired electrons are found in each of the following complex ions? -[Cr(CN)4]2-

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What is the formula for the hexaaquachromium(II) ion?

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Which of the following ligands might give linkage isomers?

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Which of the transition metals is the best conductor of heat and electric current?

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Which of the following is a d7 ion?

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In the crystal field model,ligands are treated as negative point charges.

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The metals with the highest ionization energies are most likely to be found in nature in the elemental state.

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In which of the following complexes does the transition metal have a d8 configuration?

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Which of the following is paramagnetic?

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The empirical formula of a compound with a mass percent composition of 6.78% H,31.43% N,39.76% Cl,and 22.03% Co is consistent with which of the following complexes?

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How many of the following compounds exhibit geometric isomers? I.Pt(NH3) 2Cl2 (square planar) II.[Co(H2O) 2]Cl3 III.Ni(NH3) 4(NO2) 2 IV.K2[CoCl4]

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For the process Co(NH3) 5Cl2+ + Cl- →\to→ Co(NH3) 4Cl2+ + NH3 what would be the ratio of cis to trans isomer in the product?

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A coordination compound of Cu2+ can be described as Cu(NH3) xSO4 and is known to contain 29.92% NH3 by mass.The value of x is:

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Which of the following is true about coordination complexes?

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Ni(NH3) 62+

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Here are some crystal field representations of d electrons in an octahedral complex: I) II) III) IV) V) Choose the representation that fits the transition metal atom in the following species: -Fe(OH2) 63+ (assume weak field)

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The complexes of Zn2+ are all diamagnetic.

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The 3d electrons in Co(NH3)63+ are all paired but Fe(H2O)63+ has unpaired electrons (is paramagnetic).Explain.

Correct AnswerverifiedBoth complex ions have six 3d electrons....View AnswerShow Answer

What is the correct IUPAC name for [AuCl₄(H₂O) ₂]^-?

Correct Answer
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How many unpaired electrons are found in each of the following complex ions? -[Cr(CN)₄]²^-

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Which of the following is a d⁷ ion?

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In which of the following complexes does the transition metal have a d⁸ configuration?

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How many of the following compounds exhibit geometric isomers? I.Pt(NH₃) ₂Cl₂ (square planar) II.[Co(H₂O) ₂]Cl₃ III.Ni(NH₃) ₄(NO₂) ₂ IV.K₂[CoCl₄]

Correct Answer
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For the process Co(NH₃) ₅Cl²⁺ + Cl^- $\to$ Co(NH₃) ₄Cl₂⁺ + NH₃ what would be the ratio of cis to trans isomer in the product?

Correct Answer
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A coordination compound of Cu²⁺ can be described as Cu(NH₃) _xSO₄ and is known to contain 29.92% NH₃ by mass.The value of x is:

Correct Answer
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Ni(NH₃) ₆²⁺

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Here are some crystal field representations of d electrons in an octahedral complex: I) II) III) IV) V) Choose the representation that fits the transition metal atom in the following species: -Fe(OH₂) ₆³⁺ (assume weak field)

Correct Answer
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The complexes of Zn²⁺ are all diamagnetic.

Correct Answer
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The 3d electrons in Co(NH₃)₆³⁺ are all paired but Fe(H₂O)₆³⁺ has unpaired electrons (is paramagnetic).Explain.

Correct Answer
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Both complex ions have six 3d electrons....
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