During this transition, an electron must emit some energy to get to the lower state, and this energy is released in the form of a photon.
Throughout this process, as well as the measuring process, we were careful to avoid gear back lash by always starting at a lower wavelength and turning the dial, which can be seen in Figure 3, towards the higher wavelength. We were also careful not to change the position of the prism.
Our experimental calculations are surprisingly accurate considering the fact that we were relying on a very basic form of spectroscopy. We loosened the screw on top of the prism and then rotated it by hand in order to calibrate the spectrometer to the Mercury spectral lines.
Of course these corrections are beyond the scope and level of this lab, but it could account for a small portion of our error. Calibration Initially we had to figure out how to read the dial that displayed the wavelength, and how the scale, when rotated, changed what was being viewed in the spectrometer.
We then adjusted the slit width by rotating the little knob right next to the slit opening. Balmer derived his empirical equation by relating the wavelength of the photon emitted by this transitioning electron and the principal quantum number associated with each energy level.
We were dealing with Hydrogen and Deuterium, so we had to find the accepted values for each element. It was Niels Bohr that hypothesized that electrons can only be in certain quantum states, and the "n" corresponds to these states.
Our initial results are as follows: The spectrometer can be seen at the right with the slit opening aimed at the middle of our Hydrogen tube.
Balmer related the wavelength of the photon emitted by these transitions to the principal quantum numbers associated with these transitions to form the Balmer formula. Figure 1 - Constant Deviation Spectrometer: The height of the power supply and tube assembly was adjusted so that the spectrometer was viewing the middle of the tube rather than very top of the tube.
It should also be noted that there are also relativistic and quantum electrodynamic corrections that could be made .
We had to find a width that allowed us to view the faint violets, but at the same time allowed for a decent resolution. The tube is illuminated by the power supply black box on the left which is connected to a standard wall outlet.
Finally, we calibrated the spectrometer to the red line for Mercury and took another set of data. The general setup can be seen in Figure 1 to the right.using the final volume and density of water), its specific heat, and temperature change, the heat Documents Similar To formal lab report 2 - calorimetry.
Skip carousel. carousel previous carousel next. Calorimetry Experiment Lab Report. formal lab report 1 - syn of tris. uploaded by. api cole3. uploaded by. api/5(1). FORMAL LABORA TORY REP ORT This section should be on a separate final page of the report.
Questions Although questions are not part of a formal lab report, they should be answered on a separate sheet of paper and attached to the report where applicable. SAMPLE OF A FORMAL LAB REPORT Follow this format meticulously whenever you are asked to turn in a formal lab report.
The final buret reading was recorded. The color at the endpoint was Answers to Post-Lab Questions: 1. Lab reports are an essential part of all laboratory courses and usually a significant part of your grade.
If your instructor gives you an outline for how to write a lab report, use that. Some instructors require the lab report be included in a lab notebook, while others will request a separate. View Notes - Formal Lab Report (Final Rought Draft) from CHEMISTRY 4A at University of California, Berkeley.
Spectrophotometric Analysis of Mixtures: Simultaneous Determination of Two Dyes in. Formal Report Final Draft.
From OpenWetWare. Jump to:navigation, search. Steve Koch17 December (EST):Overall, very nice report. Excellent job in taking care to get good, repeatable data. Junior Lab, Department of Physics & Astronomy, University of New Mexico.