{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem152_Calib_Report postlab 2

Chem152_Calib_Report postlab 2 - Name Emily Tsiao ID Number...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: Emily Tsiao Section: AD ID Number: 930609 Lab Partner: Haley Smith Total Points = 60 pts (5 pts notebook, 55 pts template) DATA, GRAPHS AND CALCULATIONS 513.75 nm 1 pt Creating the calibration curve: Ferroin: Concentration (M) Absorbance 1.25E-05 0.140 2.50E-05 0.300 2 pts 3.75E-05 0.450 5.00E-05 0.590 6.25E-05 0.730 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. ) Part 1 -we made 5 different standard solutions of ferroinfrom a stock solution using the equation M1V1=M2V2 to make the standard solution that was 1.25e-5 M we used 0.2mL of the stock solution and diluted it to 100mL. For the 2.5e-5M solution we used 0.4mL of the stock solution and dilited it to 100mL. For the 3.75e-5M solution we used 0.6mL of the stock solution and diluted it to 100mL. For teh 5e-5M solution we used 0.8mL of the stock solution and dilluted it to 100mL. Finally for the 6.35e-5M solution we used 1.0mL of the stock solution and diluted it to 100mL. Part 2- we made a ferroin complex from iron tablet powder, hydroxylamine and phenanthroine. To do this we heated a mixtiure of iron tablet powder and HCl until it boiled. We then filtered the solution to get all of our iron into a flask. Thjen we took 1mL of this solution and added hydroxylamine to ensure that the iron turned into Fe3+ so that the iron would react with our phenanthroline. We then added the phenanthroline and added 100mL of water to our solution and put our solution in a cuvette so that we could measure its absorbance.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern