Deck 25: Transition Metals and Coordination Compounds

Question 1

Choose the bidentate ligand from the substances below.

A) ethylenediamine
B) EDTA
C) cyanide ion
D) ammonia
E) carbon monoxide

Answer 1

ethylenediamine

Question 2

Name the following: [Fe(H₂O)₄Br₂]Cl

A) tetraaquadibromoiron(II) chloride
B) dibromotetrahydroironchloride
C) dibromotetrahydroiron(II) chloride
D) dibromotetraquairon(II) chloride
E) tetraaquadibromoiron(III) chloride

Answer 2

tetraaquadibromoiron(III) chloride

Question 3

Name the following: [Pt(H₂O)₄F₂]Br₂

A) tetraaquadifluoroplatinum(IV) bromide
B) tetraaquadibromodifluoroplantinate
C) platinum(II) bromide
D) platinum(III) tetraaquadifluorobromide
E) platinum (II) dibromodifluorotetrahydride

Answer 3

tetraaquadifluoroplatinum(IV) bromide

Question 4

Choose the electron configuration for Nb³⁺.

A) [Kr]5s¹4d²
B) [Kr]5s²4d¹
C) [Kr]5s²
D) [Kr]4d²
E) [Kr]5s²4d⁵

Question 5

Identify the ion that is responsible for the red colour of rubies.

A) Cr⁺³
B) Cr⁺⁴
C) Cr⁺⁵
D) Cr⁺⁶
E) Cr⁺⁷

Question 6

Determine the chemical formula for the compound diamminetetraaquairon(II) chloride.

A) [Fe(NH₃)₂(H₂O)₄Cl]
B) [Fe(NH₃)₂][(H₂O)₄Cl]
C) [Fe(NH₃)₂(H₂O)₄]Cl₂
D) [Fe(H₂O)₄][(NH₃)₂Cl]
E) [Fe(NH₃)₂]Cl_3·4H₂O

Question 7

Name the following: [Ni(NH₃)₃(H₂O)₃]Cl₂

A) nickel(II) trihydrotriamminechloride
B) nickel(I) triamminetrihydrochloride
C) dichloronickel(II) triamminetrihydride
D) nickel(III) chloride
E) triamminetriaquanickel(II) chloride

Question 8

Choose the electron configuration for Fe³⁺.

A) [Ar]4s²3d³
B) [Ar]3d⁵
C) [Ar]4s²3d⁹
D) [Ar]4s¹3d⁴
E) [Ar]4s²3d⁶

Question 9

Determine the chemical formula for the compound tetracarbonylplatinum(IV) chloride.

A) [Pt(CO)₄]Cl₂
B) [Pt(CO)₄]Cl₄
C) [Pt(CO)₄Cl₄]^2-
D) [PtCl₄](CO)₄
E) [Pt(CO)₄Cl₄]^4-

Question 10

Determine the chemical formula for the compound tris(ethylenediamine)chromium(III) chloride.

A) [Cr(NH₂CH₂CH₂NH₂)₃]Cl₃
B) [(NH₂CH₂CH₂NH₂)₃]Cr³⁺
C) [Cr(NH₂CH₂CH₂NH₂)₃]³⁺
D) Cl₂[Cr(NH₂CH₂CH₂NH₂)₄]
E) [Cr(NH₂CH₂CH₂NH₂)₂]Cl₂

Question 11

Identify the ion that is responsible for the green colour in emeralds.

A) Cr⁺³
B) Cr⁺⁴
C) Cr⁺⁵
D) Cr⁺⁶
E) Cr⁺⁷

Question 12

Choose the electron configuration for Zr²⁺.

A) [Kr]5s²4d²
B) [Kr]5s²
C) [Kr]4d²
D) [Ar]4s²3d¹⁰4p⁶
E) [Kr]5s²4d⁴

Question 13

Choose the electron configuration for Ti²⁺.

A) [Ar]3d²
B) [Ar]4s²3d²
C) [Ar]4s²3d⁴
D) [Ar]4s²
E) [Ne]3s²3p⁶

Question 14

Name the following: Fe[AlF₆]

A) iron(II) hexafluoroaluminate
B) iron(II) hexafluoroaluminum
C) iron(III) hexafluoroaluminate
D) iron(I) aluminumhexafluoride
E) aluminumhexafluoroferrate

Question 15

Name the following: [Fe(CO)₆][Ag(CN)₂]₂

A) iron(III) hexacarbonyl silverdicyanide
B) hexacarbonyliron(II) dicyanoargentate
C) iron(II) carbonyl silvercyanide
D) hexacarbonyliron(III) dicyanosilvate
E) iron(II) hexacarbonyl silvercyanide

Question 16

Choose the polydentate ligand from the substances below.

A) thiocyanate ion
B) EDTA
C) isocyanate ion
D) hydroxide ion
E) chloride ion

Question 17

Determine the chemical formula for the compound hexaammineiron(III) hexacyanoferrate(III).

A) [Fe₂(NH₃)₆(CN)₆]³⁺
B) [Fe(NH₃)₆][Fe(CN)₆]₂
C) [Fe(NH₃)₆]₃[Fe(CN)₆]₂
D) [Fe(NH₃)₆][Fe(CN)₆]
E) [Fe₂(NH₃)₃(CN)₃]⁶⁺

Question 18

Determine the chemical formula for the compound diaquadicarbonylzinc tetrabromopalladate(II).

A) [PdZn(H₂O)₂(CO)₂]Br₄
B) [Zn(H₂O)₂(CO)₂]₂[PdBr₄]
C) [Pd(H₂O)₂][Zn(CO)₂]Br₄
D) [Pd(H₂O)₂]₂[Zn(CO)₂]₃Br₄
E) [Zn(H₂O)₂(CO)₂][PdBr₄]

Question 19

Choose the electron configuration for Cr³⁺.

A) [Ne]3s²3p⁶
B) [Ar]4s¹3d²
C) [Ar]4s²3d¹
D) [Ar]4s²3d⁷
E) [Ar]3d³

Question 20

How many moles of aqueous ions will be produced from the dissolution of 1.0 mole of Na₂[PtCl₄] in water?

A) 3
B) 7
C) 2
D) 9
E) 1

Question 21

Identify the transition metal that is used in oxygen transport in the human body.

A) manganese
B) iron
C) zinc
D) copper
E) chromium

Question 22

How many unpaired electrons would you expect for the complex ion [Co(OH)₆]^3-?

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

Question 23

Which of the following complex ions absorbs light of the shortest wavelength?

A) [FeCl₆]^3-
B) [Fe(OH)₆]^3-
C) [Fe(CN)₆]^3-
D) [Fe(H₂O)₆]³⁺
E) [FeI₆]^3-

Question 24

Which of the following pairs of coordination compounds or complex ions are examples of linkage isomers?

A) [Cu(NH₃)₅Br]Cl and [Cu(NH₃)₅Cl]Br
B) [Fe(NH₃)₂(H₂O)₄]Cl₂ and [Fe(NH₃)₄(H₂O)₂]Cl₂
C) [Fe(CO)₅NO₂]²⁺ and [Fe(CO)₅ONO]²⁺
D) [Fe(NH₃)₂(H₂O)₄]Cl₂ and [Fe(NH₃)₂(H₂O)₄]Br₂
E) [Cr(H₂O)₆]³⁺ and [Cr(NH₃)₆]³⁺

Question 25

What is the ground-state electron configuration for Cr³⁺ (Z = 2 4)?

A) [Ar] 4s²3d⁷
B) [Ar] 4s²3d¹
C) [Ar] 3d³
D) [Ar] 4s¹3d²

Question 26

How many unpaired electrons would you expect for the complex ion [Mn(H₂O)₆]²⁺?

A) 0
B) 5
C) 3
D) 1
E) 2

Question 27

What is the ground-state electron configuration for the element chromium (Z = 24)?

A) [Ne] 4s²3d⁴
B) [Ar] 4s²3d⁴
C) [Ar] 4s¹3d⁵
D) [Ar] 3d⁶

Question 28

Which of the following compounds can exhibit fac-mer isomerism?

A) [Cr(H₂O)₄Br₂]⁺
B) [Fe(CO)₅ONO]²⁺
C) [Fe(CO)₃(NH₃)₃]³⁺
D) [Cu(CO)₅Br]⁺
E) [Fe(NH₃)₄(H₂O)₂]²⁺

Question 29

The complex ion [Ni(NH₃)₆]²⁺ has a maximum absorption near 580 nm. Calculate the crystal field splitting energy (in kJ mol^-1) for this ion.

A) 114 kJ mol^-1
B) 292 kJ mol^-1
C) 343 kJ mol^-1
D) 206 kJ mol^-1
E) 485 kJ mol^-1

Question 30

Which of the following compounds can exhibit fac-mer isomerism?

A) [Cu(CO)₅Cl]⁺
B) [Co(H₂O)₂(CO)₄]³⁺
C) [Fe(CO)₅NO₂]²⁺
D) [Fe(NH₃)₂(H₂O)₄]²⁺
E) Co(NH₃)₃Cl₃

Question 31

How many unpaired electrons would you expect for the complex ion [Fe(CN)₆]^4-?

A) 5
B) 2
C) 6
D) 4
E) 0

Question 32

What is the highest possible oxidation state for manganese?

A) +2
B) +5
C) +6
D) +7

Question 33

How many unpaired electrons would you expect for the complex ion [FeF₆]^4-?

A) 2
B) 6
C) 4
D) 3
E) 0

Question 34

How many unpaired electrons would you expect for the complex ion [MnF₆]^4-?

A) 1
B) 0
C) 5
D) 2
E) 3

Question 35

Which of the following compounds can exhibit cis-trans isomerism?

A) [Fe(CO)₅NO₂]²⁺
B) [Cu(CO)₅Cl]⁺
C) [MnClBr₃]^2-
D) [Cr(H₂O)₆]³⁺
E) [Ni(CO)₂(NH₃)₂]²⁺

Question 36

Identify the isomers that have ligands that coordinate to a metal in different orientations.

A) linkage isomers
B) cis-trans isomers
C) coordination isomers
D) optical isomers
E) stereoisomers

Question 37

Which of the following compounds can exhibit cis-trans isomerism?

A) [Cr(H₂O)₄Br₂]⁺
B) [Cu(CO)₅Br]⁺
C) [Fe(CO)₃(NH₃)₃]³⁺
D) [Fe(CO)₅ONO]²⁺
E) [Fe(NH₃)₆]²⁺

Question 38

Which of the following complex ions absorbs light of the longest wavelength?

A) [Cr(CN)₆]^3-
B) [CrCl₆]^3-
C) [Cr(en)₃]³⁺
D) [Cr(NH₃)₆]³⁺
E) [Cr(NO₂)₆]^3-

Question 39

Which of the following pairs of coordination compounds or complex ions are examples of coordination isomers?

A) [Fe(CO)₅NO₂]²⁺ and [Fe(CO)₅ONO]²⁺
B) [Fe(NH₃)₂(H₂O)₄]Cl₂ and [Fe(NH₃)₂(H₂O)₄]Br₂
C) [Fe(NH₃)₂(H₂O)₄]Cl₂ and [Fe(NH₃)₄(H₂O)₂]Cl₂
D) [Cu(CO)₅Br]Cl and [Cu(CO)₅Cl]Br
E) [MnCl₃Br]^2- and [MnClBr₃]^2-

Question 40

Which of the following is a type of structural isomerism?

A) linkage isomers
B) cis-trans isomers
C) fac-mer isomers
D) enantiomers
E) optical isomers

Question 41

Match the following.
mer-fac

A)[Cr(en)₃]³⁺
B)[Zn(NH₃)₂Cl₂]Br_{2 and} [Zn(NH₃)₂Br₂]Cl₂
C)[Ni(CN)₂(OH)₂]^2-
D)[Cr(NH₃)₃(CO)₃]³⁺
E)[Cu(SCN)₄]^3- and [Cu(NCS)₄]^3-

Question 42

Which ion would you expect to have the largest crystal field splitting, △ ?

A) [ Rh(CN)₆]^4-
B) [ Rh(CN)₆]^3-
C) [ Rh(H₂O)₆]²⁺
D) [ Rh(H₂O)₆]³⁺

Question 43

Which of the following can function as a bidentate ligand?

A) CO
B) NH₃
C) CH₃NH₂
D) H₂NCH₂^-

Question 44

Why is +2 a common oxidation state for transition elements?

Question 45

Which of the following species is diamagnetic?

A) an isolated gas-phase Cr³⁺ ion
B) a high-spin octahedral Cr²⁺ complex
C) an isolated gas-phase Cu²⁺ ion
D) a low-spin octahedral Co³⁺ complex

Question 46

Which of the following species has the electron configuration [Ar]3d⁶?

A) Fe
B) Fe³⁺
C) Co³⁺
D) Co²⁺

Question 47

Match the following.
cis-trans

A)[Cr(en)₃]³⁺
B)[Zn(NH₃)₂Cl₂]Br_{2 and} [Zn(NH₃)₂Br₂]Cl₂
C)[Ni(CN)₂(OH)₂]^2-
D)[Cr(NH₃)₃(CO)₃]³⁺
E)[Cu(SCN)₄]^3- and [Cu(NCS)₄]^3-

Question 48

Which of the following can function as a chelating agent?

A) SH^-
B) H₂O
C) H₂NCH₂CO₂^-
D) SCN ^-

Question 49

Explain how EDTA is used to treat lead poisoning.

Question 50

Match the following.
linkage

A)[Cr(en)₃]³⁺
B)[Zn(NH₃)₂Cl₂]Br_{2 and} [Zn(NH₃)₂Br₂]Cl₂
C)[Ni(CN)₂(OH)₂]^2-
D)[Cr(NH₃)₃(CO)₃]³⁺
E)[Cu(SCN)₄]^3- and [Cu(NCS)₄]^3-

Question 51

Match the following.
optical

A)[Cr(en)₃]³⁺
B)[Zn(NH₃)₂Cl₂]Br_{2 and} [Zn(NH₃)₂Br₂]Cl₂
C)[Ni(CN)₂(OH)₂]^2-
D)[Cr(NH₃)₃(CO)₃]³⁺
E)[Cu(SCN)₄]^3- and [Cu(NCS)₄]^3-

Question 52

What is a coordinate covalent bond?

Question 53

How many d electrons are there in Cr₂O₇^2-?

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

Question 54

Match the following.
coordination

A)[Cr(en)₃]³⁺
B)[Zn(NH₃)₂Cl₂]Br_{2 and} [Zn(NH₃)₂Br₂]Cl₂
C)[Ni(CN)₂(OH)₂]^2-
D)[Cr(NH₃)₃(CO)₃]³⁺
E)[Cu(SCN)₄]^3- and [Cu(NCS)₄]^3-

Question 55

What is the difference between a weak-field complex and a strong-field complex?