Name _________________________________

Inorganic Chemistry 422

Take Home Exam 3

Due May 3, 2001

All Repsonses need to appear on the Exam or attached pages.

(3 pts.) 1. What is a "three-centered" bond?

 

 

 

 

(3 pts.) 2. What is meant by the term bidentate ligand?

 

 

 

 

(6 pts.) 3. Name each of the following:
    1. [Fe(H2O)6]Cl3

      2.  

       

    2. K2[CuCl4]

      3.  

       

    3. [Co(NH3)3I3]

 

 

(6 pts.) 4. Give the formula of the coordination species shown (use [ ] to show the coordination sphere).
    1. potassium hexacyanoferrate(II)

      2.  

       

    2. bisethylenediaminedichlorocobalt(II)

      3.  

       

    3. hexaaquoiron(III) phosphate

(4 pts.) 5. Draw and label the two geometric isomers of MA4B2.

 

 

 

 

 

 

 

 

 

(4 pts.) 6. Draw and label the two geometric isomers of MA3B3.

 

 

 

 

 

 

 

 

(6 pts.) 7. Calculate the Ligand Field Stabilization Energy and the number of unpaired electrons for both the low field and high field d5 cases.

 

 

 

 

 

 

(4 pts.) 8. Describe Werner’s two levels of valence.

 

 

 

 

 

(3 pts.) 9. Why do new batteries exceed the normal 1.5 V for a "dry cell" battery?

 

 

 

 

(4 pts.) 10. Calculate the effective atomic number (EAN) for the Ru+2 ion in [Ru(NH3)4(HSO3)2] (Assume that all ligands are bidentate.)

(4 pts.) 11. Indicate the conjugate acid and conjugate base for H2O.

 

 

 

 

(3 pts.) 12. Derive the stability constant expression, bm, for the formation of [Cu(NH3)4]+2 from Cu+2 and 4 NH3.

 

 

 

 

 

(4 pts.) 13. Calculate the emf value for the following cell:

Zn/Zn+2 (a = 0.1M)//Cu+2 (0.00005M)/Cu

 

 

 

 

 

 

 

(4 pts.) 14. Balance the following redox reaction using the half-reaction technique:

Cr2O7-2 + H+ + Ce+3 à Cr+3 + Ce+4 + H2O

 

 

 

 

 

 

 

 

(3 pts.) 15. What is the splitting pattern of the d-orbitals in a tetrahedral field?

 

 

 

 

 

(3 pts.) 16. Describe why H3PO3 is considered a diprotic weak acid and not a triprotic weak acid.

(4 pts.) 17. Give examples of coordination isomerism.

 

 

 

 

 

(4 pts.) 18. Draw the chain-theory structure (Jorgensen) and coordination-theory structure (Werner) for CoCl3*5NH3 which would precipitate 2 AgCl formula units per formula unit of cobalt compound when reacted with excess Ag+.

 

 

 

 

 

 

 

 

(3 pts.) 19. What was the final evidence that Werner provided that convinced the scientific community that his coordination theory was a correct interpretation of the evidence?

 

 

 

 

 

(3 pts.) 20. Identify the ground state term and spin multiplicity for Fe+2 in an octahedral field.

 

 

 

(4 pts.) 21. What are the levels of degeneracy of A, B, E, and T terms?

 

 

 

(3 pts.) 22. What coordination number would be necessary for an Associative mechanism of an octahedral system?

 

 

 

(4 pts.) 23. What are meant by "labile" complex and "inert" complex?

 

(2 pts.) 24. In forming a Fe+2 ion, which electrons are lost?

 

 

 

(4 pts.) 25. What do chlorophyll and hemoglobin have in common? How are they different?

 

 

 

 

(5 pts.) 26. Draw all 15 possible isomers of square pyramidal MA2BCD.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I did not give nor receive any assistance nor did I see anyone else give or receive assistance on this exam.

 

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