Question 1

In the complex ion [ML6]n+, Mn+ has seven 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)  5F) B) and D)
G) All of the above

Question 2

Which response gives the correct coordination number (C.N.) and oxidation number (O.N.) of the transition metal atom in [Co(NH3) 2(H2O) 2Cl2]+?

Accepted Answer

A)  C.N. = 2; O.N. = +3
B)  C.N. = 3; O.N. = +1
C)  C.N. = 4; O.N. = +2
D)  C.N. = 6; O.N. = +1
E)  C.N. = 6; O.N. = +3F) C) and E)
G) A) and E)

Question 3

Cis-trans isomerism is exhibited by which one of these ions?

Accepted Answer

A)  [Pd(NH3) 3Cl]+
B)  [Co(NH3) 5Cl]2+
C)  [Fe(CN) 6]3-
D)  All of the above.
E)  None of the above.F) All of the above
G) B) and E)

Question 4

What is the coordination number of cobalt in [Co(NH3)6]Cl3?

Accepted Answer

Question 5

What is the oxidation number of Fe in [Fe(CN)6]4- ?

Accepted Answer

Question 6

How many unpaired electrons are there in the complex ion [Mn(CN) 6]3- ?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) B) and C)
G) B) and E)

Question 7

Consider the [CoCl6]4- ion. Which response includes all the following statements that are true and no false statements? I. The oxidation number of Co is -4.
II. The coordination number of cobalt is 6.
III. It is paramagnetic.
IV. It is a low-spin complex.

Accepted Answer

A)  I, II, III, IV
B)  I, IV
C)  II, III
D)  I, III
E)  III, IVF) A) and D)
G) None of the above

Question 8

Name the complex ion [Co(H2O)4Cl2]+.

Accepted Answer

tetraaquod...

Question 9

Name the complex ion [CuCl3Br(NH3)2]2-.

Accepted Answer

diamminebr...

Question 10

Draw and label the geometric isomers of [CrF2Cl4]3-?

Accepted Answer

Question 11

Write the chemical formula of triammineaquodichlorochromium(III)chloride.

Accepted Answer

The answer of Write the chemical formula of triammineaquodichlorochromium(III)chloride....

Question 12

In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

Accepted Answer

A)  4, +3.
B)  6, +2.
C)  4, +2.
D)  6, +3.
E)  4, +1.F) C) and D)
G) A) and B)

Question 13

Two complex ions containing Ni are [Ni(NH3) 6]2+, which is blue, and [Ni(en) 3]2+, which is purple. Which one of these statements is true?

Accepted Answer

A)  The crystal field splitting energy ( Δ\DeltaΔ ) is greater for [Ni(NH3) 6]2+ than for [Ni(en) 3]2+.
B)  [Ni(en) 3]2+ absorbs light in the violet region of the spectrum.
C)  Both complex ions are diamagnetic.
D)  The energy of the photon absorbed by [Ni(en) 3]2+ is greater than that absorbed by [Ni(NH3) 6]2+.
E)  The wavelength of the light absorbed by [Ni(en) 3]2+ is greater than the wavelength absorbed by [Ni(NH3) 6]2+. F) C) and D)
G) A) and E)

Question 14

Assuming a coordination complex is formed with Fe2+ and 1,10-phenanthroline (shown below) , which of the following statements is true? 2+ and 1,10-phenanthroline (shown below) , which of the following statements is true?   A) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 2. B) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. C) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 3. D) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6. E) If four 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 4." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 2.
B)  If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6.
C)  If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 3.
D)  If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6.
E)  If four 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 4.F) C) and D)
G) A) and E)

Question 15

The systematic name of the coordination compound K2[Co(H2O)2I4] is potassium diaquotetraiodocobaltate(II).

Accepted Answer

A) True 
 B)False

Question 16

The total number of electrons in the 3d orbitals of a copper atom is

Accepted Answer

A)  6.
B)  7.
C)  8.
D)  9.
E)  10.F) A) and B)
G) A) and C)

Question 17

In the complex ion [Co(en) 2Br2]+, the oxidation number of Co is

Accepted Answer

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

Question 18

In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are, respectively,

Accepted Answer

A)  2, 0.
B)  4, 4.
C)  5, 0.
D)  4, 2.
E)  6, 2.F) A) and E)
G) B) and D)

Question 19

The total number of electrons in the 3d orbitals of Cr3+ is

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  5.F) A) and C)
G) All of the above

Question 20

In transition metal complexes, the metal ions are Lewis acids.

Accepted Answer

A) True 
 B)False

Exam 20: The Chemistry of Coordination Compounds

In the coordination compound [Pt(NH3) 2Cl2], the coordination number and oxidation number of the central atom are, respectively,

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In transition metal complexes, the metal ions are Lewis acids.

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Name the complex ion [Co(H2O)4Cl2]+.

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In the complex ion [Co(en) 2Br2]+, the oxidation number of Co is

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Name the complex ion [CuCl3Br(NH3)2]2-.

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Consider the [CoCl6]4- ion. Which response includes all the following statements that are true and no false statements? I. The oxidation number of Co is -4. II. The coordination number of cobalt is 6. III. It is paramagnetic. IV. It is a low-spin complex.

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Draw and label the geometric isomers of [CrF2Cl4]3-?

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In the coordination compound [Co(en) 2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

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Write the chemical formula of triammineaquodichlorochromium(III)chloride.

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What is the oxidation number of Fe in [Fe(CN)6]4- ?

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What is the coordination number of cobalt in [Co(NH3)6]Cl3?

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Assuming a coordination complex is formed with Fe2+ and 1,10-phenanthroline (shown below) , which of the following statements is true?

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The total number of electrons in the 3d orbitals of a copper atom is

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Which response gives the correct coordination number (C.N.) and oxidation number (O.N.) of the transition metal atom in [Co(NH3) 2(H2O) 2Cl2]+?

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Two complex ions containing Ni are [Ni(NH3) 6]2+, which is blue, and [Ni(en) 3]2+, which is purple. Which one of these statements is true?

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In the complex ion [ML6]n+, Mn+ has seven 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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How many unpaired electrons are there in the complex ion [Mn(CN) 6]3- ?

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The systematic name of the coordination compound K2[Co(H2O)2I4] is potassium diaquotetraiodocobaltate(II).

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Cis-trans isomerism is exhibited by which one of these ions?

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The total number of electrons in the 3d orbitals of Cr3+ is

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In the coordination compound [Pt(NH₃) ₂Cl₂], the coordination number and oxidation number of the central atom are, respectively,

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Name the complex ion [Co(H₂O)₄Cl₂]⁺.

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tetraaquod...
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In the complex ion [Co(en) ₂Br₂]⁺, the oxidation number of Co is

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Name the complex ion [CuCl₃Br(NH₃)₂]^2-.

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diamminebr...
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Consider the [CoCl₆]^4- ion. Which response includes all the following statements that are true and no false statements? I. The oxidation number of Co is -4. II. The coordination number of cobalt is 6. III. It is paramagnetic. IV. It is a low-spin complex.

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Draw and label the geometric isomers of [CrF₂Cl₄]^3-?

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In the coordination compound [Co(en) ₂Cl₂]Cl, the coordination number and oxidation number of the central atom are, respectively,

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What is the oxidation number of Fe in [Fe(CN)₆]^4-?

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What is the coordination number of cobalt in [Co(NH₃)₆]Cl₃?

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Assuming a coordination complex is formed with Fe²⁺ and 1,10-phenanthroline (shown below) , which of the following statements is true?

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Which response gives the correct coordination number (C.N.) and oxidation number (O.N.) of the transition metal atom in [Co(NH₃) ₂(H₂O) ₂Cl₂]⁺?

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Two complex ions containing Ni are [Ni(NH₃) ₆]²⁺, which is blue, and [Ni(en) ₃]²⁺, which is purple. Which one of these statements is true?

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In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has seven 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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How many unpaired electrons are there in the complex ion [Mn(CN) ₆]^3- ?

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The systematic name of the coordination compound K₂[Co(H₂O)₂I₄] is potassium diaquotetraiodocobaltate(II).

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The total number of electrons in the 3d orbitals of Cr³⁺ is

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