Question 1

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) None of the above

Question 2

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) C) and E)

Question 3

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

Accepted Answer

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

Question 4

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 (an...

Question 5

The electron configuration of an Fe2+ ion is

Accepted Answer

A)  [Ar]4s24d4.
B)  [Ar]4s23d6.
C)  [Ar]3d3.
D)  [Ar]3d5.
E)  [Ar]3d6.F) A) and E)
G) C) and E)

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

tetracyano...

Question 8

Copper can be separated from iron in the ore chalcopyrite (CuFeS2)by heating the ore in the presence of oxygen to form copper(I)sulfide, iron(II)oxide, and sulfur dioxide.Write a balanced chemical equation for this process.

Accepted Answer

2CuFeS₂(s)+ 4O₂(g)...

Question 9

The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

Accepted Answer

A) True 
 B)False

Question 10

A molecule or ion that provides an electron pair for coordinate covalent bond formation is called a Lewis ________.

Accepted Answer

The answer of A molecule or ion that provides an...

Question 11

Which of these electron energy level patterns would absorb light with the shortest wavelength?

Accepted Answer

The answer of Which of these electron energy level patterns...

Question 12

What is the coordination number of chromium in Cr(en)2Cl2?

Accepted Answer

Question 13

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

Accepted Answer

Question 14

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Accepted Answer

A)  linear.
B)  square planar.
C)  tetrahedral.
D)  octahedral.E) A) and B)
F) B) and D)

Question 15

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) C) and D)
G) None of the above

Question 16

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 B)
G) A) and C)

Question 17

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

Accepted Answer

Question 18

Two well-known complex ions containing Ni are [Ni(H2O) 6]2+, which is green, 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(en) 3]2+ than for [Ni(H2O) 6]2+.
B)  [Ni(en) 3]2+ absorbs energy in the red region of the spectrum.
C)  Both complex ions are diamagnetic.
D)  [Ni(H2O) 6]2+ transmits light with wavelengths of approximately 650-700 nm.
E)  The green complex absorbs green light. F) C) and D)
G) None of the above

Question 19

Which of these ligands produces the strongest crystal field?

Accepted Answer

A)  Cl-
B)  CO
C)  OH-
D)  H2O
E)  NH3F) A) and B)
G) A) and C)

Question 20

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

Accepted Answer

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

Exam 22: Transition Metal Chemistry and Coordination Compounds

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

Correct Answerverifiedtetracyano...View AnswerShow Answer

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

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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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Two well-known complex ions containing Ni are [Ni(H2O) 6]2+, which is green, and [Ni(en) 3]2+, which is purple. Which one of these statements is true?

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The electron configuration of an Fe2+ ion is

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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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A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex 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.

Correct AnswerverifiedL is a strong-field ligand.Reasoning (an...View AnswerShow Answer

Which of these electron energy level patterns would absorb light with the shortest wavelength?

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Which of these ligands produces the strongest crystal field?

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Copper can be separated from iron in the ore chalcopyrite (CuFeS2)by heating the ore in the presence of oxygen to form copper(I)sulfide, iron(II)oxide, and sulfur dioxide.Write a balanced chemical equation for this process.

Correct Answerverified2CuFeS2(s)+ 4O2(g)...View AnswerShow Answer

What is the coordination number of chromium in Cr(en)2Cl2?

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

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A molecule or ion that provides an electron pair for coordinate covalent bond formation is called a Lewis ________.

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

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

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The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

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

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

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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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Name the complex ion [Ni(CN)₄]^2-.

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tetracyano...
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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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Two well-known complex ions containing Ni are [Ni(H₂O) ₆]²⁺, which is green, and [Ni(en) ₃]²⁺, which is purple. Which one of these statements is true?

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The electron configuration of an Fe²⁺ ion is

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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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A complex with the composition [MA₂B₂]X₂ is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex 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 (an...
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Copper can be separated from iron in the ore chalcopyrite (CuFeS₂)by heating the ore in the presence of oxygen to form copper(I)sulfide, iron(II)oxide, and sulfur dioxide.Write a balanced chemical equation for this process.

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2CuFeS₂(s)+ 4O₂(g)...
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What is the coordination number of chromium in Cr(en)₂Cl₂?

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

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

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The oxidation number of Co in [Co(NH₃)₄Cl₂]Cl is +1.

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

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

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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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