Lab report 2

# Lab report 2 - Name ID Number Section Lab Partner Note All...

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Name: Section: ID Number: Lab Partner: Total Points = 60 pts (5 pts notebook, 55 pts template) DATA, GRAPHS AND CALCULATIONS 511.88 nm 1 pt Creating the calibration curve: Ferroin: Concentration (M) Absorbance 1.25E-05 0.160 2.25E-05 0.290 2 pts 3.75E-05 0.530 5.00E-05 0.660 6.25E-05 0.830 λ max: Purpose and Method Clearly state the purpose of this part of the lab. 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 stated purpose? ( 10 pts: roughly divided 1 for the goal and 3 each for addressing each of the three parts of the experiment. ) Purpose: The purpose of this lab is quite straightforward. First I have to prepare a series of solutions from one stock solution (ferroin). Second, I must use the series of solutions to create a calibration curve to help find the concentration of the unknown solution. Method: This lab is divided into 3 parts—preparing standard solution, preparation of Iron sample and determining Iron in an Iron tablet. Part I: In this part, I will first obtain 5 mL of 6.25 x 10^-4 M ferroin stock solution and dilute it in a volumetric flask with deionized water. I am diluting this stock solution to the following stock solutions: 2.5 x 10^-5 M, 3.75 x 10^-5 M, 5 x 10^-5 M and 6.25 x 10^-5 M. I have already calculated the mL of 6.25 x 10^-4 M ferroin solution in the pre-lab using M1V1 = M2V2 equation. Part II: In this part, the goal is to dilute the tablet/powder of Iron in order to calculate the actual amount of Iron in the tablet. To do this, I will weigh and transfer 100 mg of water and allow it to heat. After the heating process is completed transfer 1 ml to a volumetric flask and add hydroxylamine hydrochloride, sodium acetate and phenantholine, water and set it aside for part III. Part III:

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Lab report 2 - Name ID Number Section Lab Partner Note All...

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