chem lab final - Small Scale Chemistry Know reasons and...

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

Small Scale Chemistry: Know: reasons and advantages Sig Figs: Know: look at #s given at beginning of problem Exp 1 Know: vocab list Exp 2 Know: definition of spectroscopy, difference btw line and continuous spectrum, energy transitions, define white light, wavelength range of white light, list colors of spectrum from highest to lowest frequency, structure of spectroscope and discharge tube, how spectroscope was calibrated, Bohr equation, Balmer series Spectroscopy: study of the interaction of electromagnetic radiation with matter (interaction of light and matter) Continuous spectrum: rainbow, shows all frequencies Line spectrum: fingerprints for elements, contain only certain frequencies depending on the elements present White light: band of light the human eye is sensitive to, 400-750 nm red lowest frequency and energy violet highest frequency and energy The narrower the slit, the thinner the line on the spectrum, the farther from light source, the fainter the line Calibration of spectroscope: grid with #s, looked at Hg spectra (values from grid) obtain known values (λ vs. grid #) c = λ ν, E = h ν (h = Planck’s constant) Balmer series: 1/λ = R (1/n f 2 – 1/n i 2 ) (R = Rydberg constant, n f = 2) % difference = ׀ accepted-observed ׀ /accepted x 100% Exp 3 Know: observed/absorbed colors, why substance absorbs visible light, technique of colorimetry, process which removes energy from excited food dye molecules, dilution equation, Beer’s law, standard deviation (2/3’s rule, by hand) color absorbed, opposite color reflected (color wheel, complimentary colors) whether or not a substance absorbs visible light depends on electronis energy levels of the molecule (how far electron is from nucleus) colorimetry:
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.
  • Fall '07
  • KEISER,JOSEPHTHOHECKMAN,KIMBERLYPROIA,MICHAELANTSANDERS,REBECCALO'NEILL,RYANSHAW
  • Chemistry, Solubility, food dye molecules, excited food dye

{[ 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