Question 1

The neutral monodentate ligand L forms the complex ion [CrL6]2+, and the magnetic properties of this complex correspond to 2 unpaired electrons. Is L a strong-field or weak-field ligand? Explain your reasoning.

Accepted Answer

L is a strong-field ligand. Reasoning (a...

Question 2

The electron configuration of a nickel atom is

Accepted Answer

A)  [Ar]4s23d6.
B)  [Ar]4s13d7.
C)  [Ar]3d8.
D)  [Ar]4s23d8.
E)  [Ar]3d10.F) C) and D)
G) D) and E)

Question 3

The electron configuration of a Co3+ ion is

Accepted Answer

A)  [Ar]3d6.
B)  [Ar]4s13d5.
C)  [Ar] 4s23d4.
D)  [Ar]3d5.
E)  [Ar]3d4.F) C) and E)
G) All of the above

Question 4

How many 3d electrons does a V3+ ion have?

Accepted Answer

A)  6
B)  5
C)  4
D)  3
E)  2F) A) and D)
G) A) and C)

Question 5

How many 3d electrons does a Mn2+ ion have?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and B)
G) A) and C)

Question 6

The ion [Co(NH3) 6]2+ is octahedral and high spin. This complex is

Accepted Answer

A)  paramagnetic, with 1 unpaired electron.
B)  paramagnetic, with 3 unpaired electrons.
C)  paramagnetic, with 4 unpaired electrons.
D)  paramagnetic, with 5 unpaired electrons.
E)  diamagnetic.F) B) and E)
G) A) and B)

Question 7

In the coordination compound K2[Co(en) Cl4], the coordination number (C.N.) and oxidation number (O.N.) of cobalt are

Accepted Answer

A)  C.N. = 6; O.N. = +2.
B)  C.N. = 6; O.N. = +3.
C)  C.N. = 5; O.N. = +2.
D)  C.N. = 5; O.N. = +4.
E)  C.N. = 4; O.N. = +3.F) B) and E)
G) D) and E)

Question 8

What is the coordination number of silver in [Ag(NH3)2]Cl?

Accepted Answer

Question 9

What terms describe the geometric isomers that are possible for the complex [CrF2Cl4]3-?

Accepted Answer

Question 10

Predict the number of unpaired electrons in the [Fe(CN)6]3- ion.

Accepted Answer

Question 11

Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH3) 2(en) Cl2].

Accepted Answer

A)  C.N. = 4; O.N. = +2.
B)  C.N. = 5; O.N. = +3.
C)  C.N. = 5; O.N. = +2.
D)  C.N. = 6; O.N. = +3.
E)  C.N. = 6; O.N. = +2.F) B) and C)
G) A) and E)

Question 12

The coordination compound shown below has

Accepted Answer

A)  two monodentate ligands and two bidentate ligands.
B)  three monodentate ligands and two bidentate ligands.
C)  four monodentate ligands and two bidentate ligands.
D)  one monodentate ligand and four bidentate ligands.
E)  four bidentate ligands.F) A) and D)
G) A) and E)

Question 13

The best name for K4[FeCl2(CN) 4] is

Accepted Answer

A)  tetrapotassium dichlorodicyanoiron(II) .
B)  potassium dichlorodicyanoiron(II) .
C)  potassium dichlorodicyanoferrate(III) .
D)  tetrapotassium dichlorobis(cyano) iron(III) .
E)  potassium dichlorotetracyanoferrate(II) .F) B) and E)
G) C) and D)

Question 14

The electron configuration of a Cr3+ ion is

Accepted Answer

A)  [Ar]3d5.
B)  [Ar]4s13d2.
C)  [Ar]3d3.
D)  [Ar]4s13d5.
E)  [Ar]4s23d4.F) C) and D)
G) A) and D)

Question 15

Write the chemical formula of diamminedichloroplatinum(II).

Accepted Answer

The answer of Write the chemical formula of diamminedichloroplatinum(II)....

Question 16

Which of these ligands produces the weakest crystal field?

Accepted Answer

A)  CN-
B)  I-
C)  OH-
D)  H2O
E)  NH3F) B) and D)
G) B) and C)

Question 17

The numbers of geometrical isomers and optical isomers of the complex ion [Co(en) 3]3+ are, respectively,

Accepted Answer

A)  2 and 2.
B)  1 and 1.
C)  3 and 2.
D)  1 and 2.
E)  2 and 4.F) A) and E)
G) C) and D)

Question 18

In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) None of the above
G) C) and D)

Question 19

In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a strong field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  5F) B) and D)
G) C) and E)

Question 20

Name the complex ion [Ni(CN)4]2-.

Accepted Answer

tetracyano...

Exam 20: The Chemistry of Coordination Compounds

In the coordination compound K2[Co(en) Cl4], the coordination number (C.N.) and oxidation number (O.N.) of cobalt are

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Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH3) 2(en) Cl2].

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Which of these ligands produces the weakest crystal field?

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Write the chemical formula of diamminedichloroplatinum(II).

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In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

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In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a strong field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

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The best name for K4[FeCl2(CN) 4] is

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The electron configuration of a Cr3+ ion is

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The numbers of geometrical isomers and optical isomers of the complex ion [Co(en) 3]3+ are, respectively,

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Name the complex ion [Ni(CN)4]2-.

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The electron configuration of a Co3+ ion is

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The neutral monodentate ligand L forms the complex ion [CrL6]2+, and the magnetic properties of this complex correspond to 2 unpaired electrons. Is L a strong-field or weak-field ligand? Explain your reasoning.

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Predict the number of unpaired electrons in the [Fe(CN)6]3- ion.

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What terms describe the geometric isomers that are possible for the complex [CrF2Cl4]3-?

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How many 3d electrons does a V3+ ion have?

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What is the coordination number of silver in [Ag(NH3)2]Cl?

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The electron configuration of a nickel atom is

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The coordination compound shown below has

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How many 3d electrons does a Mn2+ ion have?

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The ion [Co(NH3) 6]2+ is octahedral and high spin. This complex is

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In the coordination compound K₂[Co(en) Cl₄], the coordination number (C.N.) and oxidation number (O.N.) of cobalt are

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Give the coordination number (C.N.) and oxidation number (O.N.) of the metal atom in the coordination compound [Cr(NH₃) ₂(en) Cl₂].

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In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has six d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

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In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has seven d electrons and L is a strong field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

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The best name for K₄[FeCl₂(CN) ₄] is

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The electron configuration of a Cr³⁺ ion is

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The numbers of geometrical isomers and optical isomers of the complex ion [Co(en) ₃]³⁺ are, respectively,

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Name the complex ion [Ni(CN)₄]^2-.

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tetracyano...
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The electron configuration of a Co³⁺ion is

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The neutral monodentate ligand L forms the complex ion [CrL₆]²⁺, and the magnetic properties of this complex correspond to 2 unpaired electrons. Is L a strong-field or weak-field ligand? Explain your reasoning.

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L is a strong-field ligand. Reasoning (a...
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Predict the number of unpaired electrons in the [Fe(CN)₆]^3- ion.

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What terms describe the geometric isomers that are possible for the complex [CrF₂Cl₄]^3-?

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How many 3d electrons does a V³⁺ ion have?

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What is the coordination number of silver in [Ag(NH₃)₂]Cl?

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How many 3d electrons does a Mn²⁺ ion have?

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The ion [Co(NH₃) ₆]²⁺ is octahedral and high spin. This complex is

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