CH202 In Lab 02 Solutions a..

CH202 In Lab 02 Solutions a.. - CH202 In Lab 02 Solutions...

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CH202 In Lab 02 Solutions and Spectroscopy (In-Lab) SCHNELL ZACHARY EUGENE CH202, section 005, Fall 2008 Instructor: weiming zheng TA Web Assign Current Score: 50 out of 50 Due: Tuesday, September 2, 2008 07:15 PM EDT The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may not grant you an extension if you have viewed the answer key. Request Extension View Key 1. 30/30 points Part A: Data Table A. Calibration Curve of Cu 2+ Solutions and Unknown Stock Cu 2+ solution concentration .496 M Solution # Target volume of Cu 2+ , mL Actual volume of Cu 2+ , mL Target volume of H 2 O, mL Actual volume of H 2 O, mL [Cu 2+ ], M (calculated) Absorbance at 620 nm (measured) 1 1.20 1.30 4.80 5.50 .0948 .048 2 2.40 2.50 3.60 3.70 .200 .101 3 3.60 3.50 2.40 2.30 .299 .152 4 4.80 4.90 1.20 1.10 .405 .205 Equation of Trendline y = .507 x+ -8.74e-05 R 2 = 1.00 Unknown # 1 Absorbance at 620 (measured)
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CH202 In Lab 02 Solutions a.. - CH202 In Lab 02 Solutions...

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