Lab10_results - Experiment 10: Optical Properties of...

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Unformatted text preview: Experiment 10: Optical Properties of Transition Metal Complexes Michael Butler Georgia Tech Honor Challenge I commit to uphold the ideals of honor and integrity by refusing to betray the trust bestowed upon me as a member of the Georgia Tech community. Date Submitted: 7/28/10 Lab Partner: Shivani Shah Lab Section/TA: 1312 A2/Lisa Vaughan STUDENTS NOTES: Chem 1312: Exp 10 Optical Properties of Transition Metal Complexes Learning Objectives & Lab Skills: Relate visible absorption spectra to d-d transitions in metal ion complexes Relate ligand strength to d-orbital splitting and color absorbed by complexes, color of complexes Calculate and E and relate to transitions seen or not seen in the visible, color and probability of transition. POST-LAB I Title/Cover Page- 5pts II. Data/Results/Sample Calculations (50 pt total) PART A. DATA (10 pts) Combined spectra plot of all salts on scale ( 5pt) and table below (5 pt) Compound g used MW Molarity max (nm) A . Complex formed Color Observed Co(NO 3 ) 2 6H 2 O 2.910 291.05 0.100 514.0 0.482 Co(H 2 O) 6 2+ Red Cu(NO 3 ) 2 6H 2 O 2.416 295.67 0.100 811.2 1.202 Cu(H 2 O) 6 2+ Blue MnCl 2 4H 2 O 1.982 197.90 0.100 390.4 0.004 Mn(H 2 O) 6 2+ Clear Ni(NO 3 ) 2 6H 2 O 2.910 290.82 0.100 396.3 0.505 Ni(H 2 O) 6 2+ Green Zn(NO 3 ) 2 6H 2 O 2.978 297.50 0.100 388.2 0.002 Zn(H 2 O) 6 2+ Clear PART A RESULTS (12 pts) Co(H 2 O) 6 2+ 5.14E-07 4.82 3.86E-19 232.45-0.80 Cu(H 2 O) 6 2+ 8.11E-07 12.02 2.45E-19 147.54-0.60 Mn(H 2 O) 6 2+ 3.90E-07 0.04 5.09E-19 306.52 0.00 Ni(H 2 O) 6 2+ 3.96E-07 5.05 5.02E-19 302.30-1.20 Zn(H 2 O) 6 2+ 3.88E-07 0.02 5.12E-19 308.33 0.00 Sample Calculations: for Co(H 2 O) 6 2+ (5 pts each = 15 pts) 1. Molar absorptivity; 2. E, J/molecule 3. E, KJ/mole PART B....
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This note was uploaded on 10/21/2010 for the course CHEMISTRY 1312 taught by Professor Bottomley during the Summer '10 term at Georgia Institute of Technology.

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Lab10_results - Experiment 10: Optical Properties of...

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