Prelab for Spectrophotometric Determination of Multi-Component Solutions

Prelab for Spectrophotometric Determination of Multi-Component Solutions

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

Prelab for Spectrophotometric Determination of Multi-Component Systems Chemisty 112L Section 001 September 30, 2014 1. Interference is when more than one species absorbs at the same wavelength. The closer the two curves are to one another, the greater the interference. 2. 6.2 g 2 qt 1 qt 946.352946 mL 100 mL 1 = 0.32757 g When rounded to the correct number of significant figures 0.33 g of powder would need to be weighted out to make 100.0 mL of solution with the same concentration. 3. The variables plotted on the x and y axes in a Beer’s Law graph are concentration and absorbance respectively. The slope of this graph provides the molar absorptivity of the solution being graphed. 4. I will use the two equation method presented in the introduction of the prelab to simultaneously solve for the two unknown concentrations. | ( λmax A ) | = ε A ( λmax A ) C A + ε B ( λmax A ) C B 0.75 =( 7.8 M 1 cm 1 ) C A +( 1.5 M 1 cm 1 ) C B | ( λmax B ) | = ε A ( λmax B ) C A + ε B ( λmax B ) C B 0.45 =( 2.6 M 1 cm 1 ) C A +( 5.2 M 1 cm 1 ) C B
Image of page 1

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

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