Lab 3 - Solutions and Spectroscopy

00 ml volumetric flask and dilute to the mark with

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Unformatted text preview: ount that you used in Data Table B. 2 Transfer the CuSO4 · 5 H2O into a 25.00 mL volumetric flask and dilute to the mark with deionized water as shown in the Volumetric Flask video under Instrumentation and described in the Volumetric Glassware section of in the Introductory Material of this lab manual. 3 After the solution is well mixed, condition a vial with it. Then refill the vial, measure and record the absorbance of your solution nm in Data Table B. Part C: Preparation of a Copper(II) Ion Solution by Dilution of a Stock CuSO4 Solution. 1 Record the exact concentration of the stock copper(II) solution in Data Table C. 2 In a small, clean beaker, obtain a little more of the stock copper(II) solution than you calculated in Question 6. 3 First condition a serological pipet, then use it to transfer the volume of copper(II) solution you calculated into a 25.00 mL volumetric flask. Record the exact amount that you transferred in Data Table C. Dilute to the mark with deionized water. 4 After the solution is well mixed, condition a vial with it. Then refill the vial, measure and record the absorbance of your solution in Data Table C. 5 When you are finished taking measurements, collect all your copper solution waste and place it in the waste bottle in the lab, making sure not to overfill it. Rinse and dry all your glassware with water and return it to the setup area where you found it. Close the MicroLab software. 6 www.webassig n.net/ebooks/wsug encheml1/lab_3/manual.html 6/7 4/15/13 Lab 3 - Solutions and Spectr oscopy Remember to show your TA your calibration curve and measured [Cu2+] concentration of your solutions for Part B and Part C. Your TA will manually grade the results and enter your score into WebAssign. 7 Before leaving, enter your results in the In- Lab assignment. If all results are scored as correct, log out. If not all results are correct, try to find the error or consult with your lab instructor. When all results are correct, note them and log out of WebAssign. The In- Lab assignment must be completed by the end of the lab period. If additional time is required, please consult with your lab instructor. Copyright © 2011 Advanced Instructional Systems, Inc. and North Carolina State University | Credits www.webassig n.net/ebooks/wsug encheml1/lab_3/manual.html 7/7...
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This document was uploaded on 01/22/2014.

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