hw12 - d electrons (how many in t 2 g orbitals and how many...

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CHM 2047 Homework 12 This assignment is due Friday, Dec. 2, in class. 1. Kotz, Ch. 22, Problem 50. 2. Kotz, Ch. 22, Problem 52. 3. Kotz, Ch. 22, Problem 54. 4. Kotz, Ch. 22, Problem 56. 5. Kotz, Ch. 22, Problem 66. 6. A coordination compound has the empirical formula PtBr(en)(SCN) 2 and is diamag- netic. (a) By examining the d electron con±gurations on the metal atoms, explain why the formulation [Pt(en) 2 (SCN) 2 ][PtBr 2 (SCN) 2 ] is preferred for this substance. (b) Name this substance. 7. The three complex ions [Mn(CN) 6 ] 5 - , [Mn(CN) 6 ] 4 - and [Mn(CN) 6 ] 3 - have all been synthesized, and all are low-spin octachedral complexes. For each complex, determine the oxidation number of Mn, the con±guration of the
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Unformatted text preview: d electrons (how many in t 2 g orbitals and how many in e g ), and the number of unpaired electrons present. 8. The complex ion CoCl 2-4 has a tetrahedral stucuture. How many d electrons are on the Co? What is its electronic conguration? Why is the tetrahedral structure stable in this case? 9. Calculate K f for Zn(NH 3 ) 2+ 4 (aq) via electrochemical information. The standard volt-ages for the relevant half-reactions can be found in the table on the CHM 2047 web site. 10. When 2 M HNO 3 is mixed with Cu 2 O, the principle products are Cu(H 2 O) 2+ 6 (aq) and H 2 (g). Write a balanced formula for this reaction....
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This note was uploaded on 05/29/2011 for the course CHM 2047 taught by Professor Staff during the Fall '08 term at University of Florida.

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