Complex Ions Lab

Complex Ions Lab - Chem 125 Name: Dr. Nguyen Roman Ferro...

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Chem 125 Dr. Nguyen Name: Roman Ferro Partner: Bobby Dodge Partner: Trevor Johnson (Prelab: 4 pts) Experiment 3: Determination of the Formula for a Metal Ion Complex Part 1: Preparation of Standard Solutions ( 3 pts ) Fe(II) and Phenanthroline Mixtures Tube No. Volume Fe 2+ (mL) Volume Phenanthroline (mL) Total Volume (mL) Mole Fraction Phenanthroline 1 4.50 0.50 5 0.1 2 4.00 1.00 5 0.2 3 3.50 1.50 5 0.3 4 3.00 2.00 5 0.4 5 2.50 2.50 5 0.5 6 2.00 3.00 5 0.6 7 1.50 3.50 5 0.7 8 1.00 4.00 5 0.8 9 0.80 4.20 5 0.84 10 0.60 4.40 5 0.88
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11 0.40 4.60 5 0.92 12 0.20 4.80 5 0.96 In the space below, show your calculation for the mole fraction of 1,10-phenanthroline for tube #5. Be sure to include units where appropriate. ( 1 pt ) =.5 Part 2: Determination of the λ max for the Standard Solutions The wavelength of maximum absorbance ( λ max ) is : 480 nm ( 0.5 pt ) Insert a copy of your Excel graph you prepared in order to determine the wavelength of maximum absorbance for the metal-ion complex. ( 3 pts ) Part 3: Absorbance of Standard Solutions
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This note was uploaded on 11/14/2011 for the course CHEM 125 taught by Professor Retsek during the Fall '08 term at Cal Poly.

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Complex Ions Lab - Chem 125 Name: Dr. Nguyen Roman Ferro...

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