Chem 152 - Lab 2 - Calibration Curves

Chem 152 - Lab 2 - Calibration Curves - Name: Alice Meng-Ju...

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734371 Total Points = 60 pts (5 pts notebook, 55 pts template) Part I: Preparing Standard Solutions and a Calibration Curve DATA, GRAPHS AND CALCULATIONS 1 pt Concentration (M) Absorbance 1.25E-05 0.10 2.50E-05 0.26 2 pts 3.75E-05 0.42 5.00E-05 0.53 6.25E-05 0.66 Name: Alice Meng-Ju Hsieh Section: AP Lab Partner: Chris Luong Purpose and Method Part I: The purpose is to learn how to prepare standard solutions to generate a calibration curve. Explain how this is accomplished in this experiment. What calculations do you need to perform? What measurements will be made? [Do not provide experimental details here]. How do you go from calculated/measured values to accomplishing the stated purpose? ( 5 pts ) We learn how to prepare standard solutions to generate a calibration curve by using a digital pipettor to deliver a small volume of the stock solution to a 10mL volumetric flask. Next, we add deionized water to dilute the stock solution to the calibraon mark. We will prepare 5 different standard solutions. We will use the following equation to solve for any unknowns: [stock solution] x Volume of stock solution = [given solution] x (volume of stock solution + volume of water added) From calculated/measured values, we will know how much stock solution to add in order to prepare a standard solution with a specified concentration. The overview of steps are summarized above. (using a digital pipetor, adding deionized water. .etc) Part II: The purpose is to determine mg Fe in a tablet. Explain how this is accomplished in this experiment. What measurements will be made? [Do not provide experimental details here]. How do you go from measured values (data) to calculated results to accomplishing the stated purpose? Include relevant chemical equations and mathematical expressions in this discussion. (
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This note was uploaded on 10/27/2010 for the course CHEM 152 taught by Professor Chiu during the Spring '08 term at University of Washington.

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Chem 152 - Lab 2 - Calibration Curves - Name: Alice Meng-Ju...

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