Coordination Compounds Practice Test

 

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  1. Give the number of geometric isomers for the square planar compound [MABCD] where M represents a metal and A, B, C, and D represent ligands.

      2.  

    • 1

      •  

    • 2

      •  

    • 3

      •  

    • 4

      •  

    • There are no geometric isomers

     

     

  2. The spectrochemical series is (going from weak to strong field):
    I - < Br - < Cl - < F - < OH - < H2O < NH3 < en < NO2 - < CN -
    Consider (1) [Co(I)6] 3-  and (2) [Co(CN)6] 3-

      3.  

    • (1) is paramagnetic, (2) is not.

      •  

    • (2) is paramagnetic, (1) is not.

      •  

    • Both are paramagnetic

      •  

    • None of them are paramagnetic

     

     

  3. Consider the complex ions Co(NH3)63+, Co(CN)63- and CoF63-. The reflected colors were violet, orange and green.  Match the complex ion to the color reflected.

    4.  

     

  4. Which of the following metal ions should be colorless?  Pick all that apply.

      5.  

    • Ti4+

      •  

    • Cu+

      •  

    • Cr3+

      •  

    • Sc2+

      •  

    • Zn2+

     

     

  5. What is the electron configuration for the transition metal ion in the compound:
    (NH4)2[Fe(H2O)2Cl4]

    6.  

     

  6. Name the following compounds:

      7.  

    • K2[Ag(H2O)3Br3]

      •  

    • [Mn(NH2CH2CH2NH2)3]SO4

      •  

    • [Pt(NH3)4I2][PtI4]
      (hint: Pt is commonly found in the +2 or +4 oxidation state)

     

     

  7. Sodium nitroprusside, Na2[Fe(CN)5(NO)], is an octahedral complex given to heart transplant patients.  It contains the nitrosonium ligand, NO+, which is one of the few known cationic ligands.  Given this, determine the oxidation state of Fe in sodium nitroprusside.

      8.  

    • -1

      •  

    • 0

      •  

    • +1

      •  

    • +2

      •  

    • +3

     

     

  8. How many unpaired electrons are present in sodium nitroprusside?

      9.  

    • 0

      •  

    • 1

      •  

    • 2

      •  

    • 4

      •  

    • 5

     

     

  9. For the reaction:

    [Fe (CN)5Br]3- + Br-     → [Fe(CN)4Br2]3- + CN-

    What would the predicted ratio of cis to trans isomer of the product?

    10.  

     

  10. What is the name of the nonpolar complex ion, [Cr(H2O)4I2]+? Include cis/trans geometry.

    11.  

     

  11. What is the name of the polar complex ion, [CuCl2F2]2-?  Include cis/trans geometry.

    12.  

     

  12. Which of the following metal ions should exhibit the largest crystal field splitting?

      13.  

    • Fe3+

      •  

    • Ir3+

      •  

    • Mn3+

      •  

    • Co3+

     

     

  13. How many distinct geometric isomers are there in the figure below?

    14.  

     

  14. Is this compound capable of linkage isomerism?  If so, through which ligand.

      15.  

    • This is compound only exhibits stereoisomerism.

      •  

    • Yes, through the Br – ligand.

      •  

    • Yes, through the H2O ligand.

      •  

    • Yes, through the CN – ligand.

      •  

    • b-d are correct.

     

     

  15. The complex CrL62+, where L is a neutral ligand, appears yellow.  The number of unpaired d electrons in this complex ion is?

    16.  

     

  16. Give the number of geometric isomers for the octahedral compound [MA3B2C], where A, B and C represents ligands.

      17.  

    • 2

      •  

    • 3

      •  

    • 4

      •  

    • 5

      •  

    • 6

     

     

  17. Which metal has a d5 electron configuration?

      18.  

    • Pd2+

      •  

    • Ag+

      •  

    • Fe3+

      •  

    • Os2+

      •  

    • Co2+

     

     

  18. Excess Ag+ reacts with one mole of [COCl3(NH3)3].  How many moles of AgCl does this produce?

      19.  

    • 0

      •  

    • 1

      •  

    • 2

      •  

    • 3

      •  

    • 6

     

     

  19. Which of the following coordination compounds will form a precipitate when  treated with an aqueous solution of AgNO3?

      20.  

    • [Cr(NH3)3Cl3]

      •  

    • [Cr(NH3)6]Cl3

      •  

    • Na3[Cr(CN)6]

      •  

    • Na3[CrCl6]

      •  

    • all of these

     

     

  20. Calculate the total number of unpaired electrons in the following complex ions:

    Ni(H2O)62+, Fe(CN)42-, Co(NH3)62+.

    21.  

     

  21. Give the number of geometric isomers for the octahedral compound [MAB4C], where A, B, and C represent ligands.

    22.  

     

  22. True or False

    The complex [HgI4] 2- ion could be expected to appear green because I- is a weak field ligand.

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