Question 1

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 B)
G) A) and C)

Question 2

The chemical formula of the dibromobis(oxalato)cobaltate(III) ion is:
[CoBr2(C2O4)2]3-

Accepted Answer

A) True 
 B)False

Question 3

In Na3[Ni(SCN) 5], how many 3d electrons does nickel have

Accepted Answer

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

Question 4

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

Accepted Answer

A)   2
B)   4
C)   6
D)   8
E)   None of the aboveF) A) and B)
G) A) and C)

Question 5

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 E)
G) A) and E)

Question 6

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

Accepted Answer

A)   0
B)   1
C)   3
D)   5
E)   None of the aboveF) A) and B)
G) C) and E)

Question 7

Which of these square planar complex ions can have cis-trans isomers

Accepted Answer

A)   [Pt(NH3) 4]2+
B)   [Ni(NH3) 4]2+
C)   [Pt(NH3) 2Cl2]
D)   [Pt(NH3) Cl3]-
E)   [Ni(NH3) 3Cl]+F) C) and D)
G) B) and E)

Question 8

In the coordination compound [Cr(NH3) (en) 2Cl]Br2, the coordination number (C.N.)  and oxidation number (O.N.)  of the metal atom are, respectively,

Accepted Answer

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

Question 9

Which of these complex ions would absorb light with the longest wavelength

Accepted Answer

A)   [Co(H2O) 6]2+
B)   [Co(NH3) 6]2+
C)   [CoF6]4-
D)   [Co(CN) 6]4-
E)   [Co(en) 6]2+F) D) and E)
G) B) and E)

Question 10

In K4[Fe(CN) 6], how many 3d electrons does the iron atom have

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7F) C) and D)
G) A) and B)

Question 11

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) A) and D)
G) A) and E)

Question 12

A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis base.

Accepted Answer

A) True 
 B)False

Question 13

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 one other product. Complete the following partially balanced equation by deciding both the identity of the missing compound and the number of moles required to balance the equation. (Note, no other coefficients are allowed to be changed.)  
2CuFeS2(s)  + 4O2(g)   →\rarr→ Cu2S(s)  + 2FeO(s)  + _____

Accepted Answer

A)  2SO3(g) 
B)  3SO3(g) 
C)  2SO2(g) 
D)  3SO2(g) 
E)  None of the above F) A) and B)
G) All of the above

Question 14

The correct name of the complex ion [Co(H2O)4Cl2]+ is:
tetraaquodichlorocobalt(III) ion

Accepted Answer

A) True 
 B)False

Question 15

In the complex ion [Fe(CN) 6]4-, the oxidation number of Fe is

Accepted Answer

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

Question 16

Which of these ligands produces the strongest crystal field

Accepted Answer

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

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

Determine 
(i)  the oxidation number of the metal, 
(ii)  the number of d electrons, 
(iii)  the coordination number, 
(iv)  the charge of the complex ion, and 
(v)  the number and type of ligands for the coordination compound shown below.

Accepted Answer

A)   i = +2; ii = 3 d electrons; iii = 5; iv = 1+; v = zero monodentate and four bidentate
B)   i = +3; ii = 2 d electrons; iii = 6; iv = 1+; v = two monodentate and two bidentate
C)   i = +2; ii = 3 d electrons; iii = 5; iv = 1+; v = two monodentate and one bidentate
D)   i = +3; ii = 3 d electrons; iii = 6; iv = 1+; v = two monodentate and two bidentate
E)   None of the above have all five answers correctly presentedF) All of the above
G) A) and D)

Question 19

The correct formula for sodium tetracyanonickelate(II)  ion is:

Accepted Answer

A)   Ni(CN) 4
B)   [Ni(CN) 4]+
C)   [Ni(CN) 4]2+
D)   [Ni(CN) 4]-
E)   [Ni(CN) 4]2-F) C) and D)
G) A) and D)

Question 20

What is the oxidation number of Co in the complex [Co(H2O) 4Cl2]Cl

Accepted Answer

A)   +1
B)   +2
C)   +3
D)   +4
E)   None of the aboveF) A) and B)
G) C) and E)

Exam 23: Transition Metals Chemistry and Coordination Compounds

Which of these complex ions would absorb light with the longest wavelength

Correct Answer
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The correct formula for sodium tetracyanonickelate(II) ion is:

Correct Answer
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The chemical formula of the dibromobis(oxalato)cobaltate(III) ion is: [CoBr₂(C₂O₄)₂]^3-

Correct Answer
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What is the oxidation number of Co in the complex [Co(H₂O) ₄Cl₂]Cl

Correct Answer
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Correct Answer
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In the coordination compound [Cr(NH₃) (en) ₂Cl]Br₂, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

Correct Answer
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Determine (i) the oxidation number of the metal, (ii) the number of d electrons, (iii) the coordination number, (iv) the charge of the complex ion, and (v) the number and type of ligands for the coordination compound shown below.

Correct Answer
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Which of these square planar complex ions can have cis-trans isomers

Correct Answer
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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]⁺

Correct Answer
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The correct name of the complex ion [Co(H₂O)₄Cl₂]⁺ is: tetraaquodichlorocobalt(III) ion

Correct Answer
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Which of these ligands produces the strongest crystal field

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

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

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

Correct Answer
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A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis base.

Correct Answer
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The electron configuration of a Cr³⁺ ion is

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

Correct Answer
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In the complex ion [Fe(CN) ₆]^4-, the oxidation number of Fe is

Correct Answer
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In K₄[Fe(CN) ₆], how many 3d electrons does the iron atom have

Correct Answer
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In Na₃[Ni(SCN) ₅], how many 3d electrons does nickel have

Correct Answer
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Exam 23: Transition Metals Chemistry and Coordination Compounds

Which of these complex ions would absorb light with the longest wavelength

Correct AnswerverifiedShow Answer

The correct formula for sodium tetracyanonickelate(II) ion is:

Correct AnswerverifiedShow Answer

The chemical formula of the dibromobis(oxalato)cobaltate(III) ion is: [CoBr2(C2O4)2]3-

Correct AnswerverifiedShow Answer

What is the oxidation number of Co in the complex [Co(H2O) 4Cl2]Cl

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the coordination compound [Cr(NH3) (en) 2Cl]Br2, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

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Determine (i) the oxidation number of the metal, (ii) the number of d electrons, (iii) the coordination number, (iv) the charge of the complex ion, and (v) the number and type of ligands for the coordination compound shown below.

Correct AnswerverifiedShow Answer

Which of these square planar complex ions can have cis-trans isomers

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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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The correct name of the complex ion [Co(H2O)4Cl2]+ is: tetraaquodichlorocobalt(III) ion

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Which of these ligands produces the strongest crystal field

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

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

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A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis base.

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The electron configuration of a Cr3+ ion is

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

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In the complex ion [Fe(CN) 6]4-, the oxidation number of Fe is

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In K4[Fe(CN) 6], how many 3d electrons does the iron atom have

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In Na3[Ni(SCN) 5], how many 3d electrons does nickel have

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Correct Answer
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Correct Answer
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The chemical formula of the dibromobis(oxalato)cobaltate(III) ion is: [CoBr₂(C₂O₄)₂]^3-

Correct Answer
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What is the oxidation number of Co in the complex [Co(H₂O) ₄Cl₂]Cl

Correct Answer
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Correct Answer
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In the coordination compound [Cr(NH₃) (en) ₂Cl]Br₂, the coordination number (C.N.) and oxidation number (O.N.) of the metal atom are, respectively,

Correct Answer
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Correct Answer
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Correct Answer
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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]⁺

Correct Answer
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The correct name of the complex ion [Co(H₂O)₄Cl₂]⁺ is: tetraaquodichlorocobalt(III) ion

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

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

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

Correct Answer
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Correct Answer
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The electron configuration of a Cr³⁺ ion is

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

Correct Answer
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In the complex ion [Fe(CN) ₆]^4-, the oxidation number of Fe is

Correct Answer
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In K₄[Fe(CN) ₆], how many 3d electrons does the iron atom have

Correct Answer
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In Na₃[Ni(SCN) ₅], how many 3d electrons does nickel have

Correct Answer
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