Chemistry (Chang), 10th Edition

Chapter 22: Transition Metal Chemistry and Coordination Compounds

Self Assessment A

1
The electron configuration of a Ni2+ ion is:
A)[Ar]4s23d8
B)[Ar]4s23d6
C)[Ar]3d8
D)[Ar]3d6
2
The Fe3+ ion has _____ electrons in 3d orbitals.
A)6
B)5
C)4
D)3
E)2
3
A ligand is:
A)a molecule or ion that has at least one lone pair of electrons
B)a nucleophile
C)a Lewis base
D)part of a coordination compound
E)All of the above
4
In K[Cu(CN)2], how many 3d electrons does the copper ion have?
A)10
B)9
C)8
D)7
E)6
5
Which of the following is a bidentate ligand?
A)cyanide ion
B)nitrite ion
C)ammonia
D)thiocyanate ion
E)ethylenediamine
6
The correct chemical formula for tetraamminecopper(II) chloride is:
A)[Cu(NH3)4Cl]
B)[Cu(NH3)4]Cl2
C)[Cu(NH3)4]Cl3
D)[Cu(NH3)4]Cl
E)[Cu(NH3)]Cl4
7
The best name for K[Cr(NH3)2Cl2(CN)2] is:
A)potassium diamminedichlorodicyanochromate(III)
B)potassium diamminedichlorodicyanochromium(III)
C)potassium diamminedichlorochromatium(III) cyanide
D)potassium diamminedichlorochromate(II) cyanide
E)potassium diamminedichlorodicyanochromate(II)
8
Which of the following species could exist as a pair of isomers?
A)[Pt(NH3)3Cl]+
B)[Fe(CN)6]3-
C)[Co(H2O)4Cl2]+
D)[Pt(en)Cl2]
E)[Pt(NH3)Br3]-
9
Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II)?
A)CN-
B)NO2-
C)I-
D)CO
E)en
10
In the complex ion ML6n+, Mn+ has four d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of this complex ion correspond to the presence of how many unpaired electrons?
A)0
B)1
C)2
D)3
E)4
11
Why are phosphates being eliminated from detergents?
A)Detergents with phosphates are less efficient cleansers.
B)By chelating Ca2+ ions, the phosphates allow more efficient cleansing.
C)Phosphates are important plant nutrients which increase algae growth and deplete oxygen.
D)None of the above.
12
The magnitude of crystal field splitting has a direct effect on the color of complex ions.
A)True
B)False
13
Place the ligands, CN-, Br-, H2O, and OH- in order from least to greatest according to their ability to split the d orbital energy level.
A)CN-, OH-, H2O, Br-
B)Br-, OH-, H2O, CN-
C)Br-, H2O, CN-, OH-
D)None of the above
14
Labile complexes....
A)undergo rapid ligand exchange reactions.
B)exchange ligands slowly in reactions.
C)have large formation constants.
D)none of the above.
15
Coordination compounds are useful in:
A)biological organisms because of their color
B)industry due to their magnetic properties
C)biological organisms as ligand transporters
D)none of the above
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