UV-visible spectroscopy EXCEL.docx - Dino Jake Ciccone CHEM...

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Dino Jake CicconeCHEM 2800March 8th, 2017Experiment VIUV-Visible Spectroscopy Objective:This lab will familiarize the basic fundamental methods of standard addition. There is an emphasis on knowing the difference between external, internal, and standard addition nomenclature. There is a new piece of equipment that will measure the concentration of several diluted solutions.Reagents:MethanolAcetylsalicylic acidPre-lab questions:1.a. (5) You will create 1.000L of 100.0 ppm stock solution of Acetylsalicylic acid(ASA, from the pure powder) in a 2 (v/v)% HCl in this lab. 2 (v/v) % HCl means the volume of concentrated HCl and the volume of the diluted HCl is 2:100. Determine the mass of the solute and volume of conc. HCl you are going to weigh out or measure with a graduated cylinder. Show your calculation. b. (5) Describe exactly how you will make the 1.000 L of 100.0 ppm ASA.

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