152 Exp 6 Report - EXPERIMENT 6: Pts ATOMIC EMISSION...

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Unformatted text preview: EXPERIMENT 6: Pts ATOMIC EMISSION SPECTROSCOPY(AES) Part II. Measuring the Hydrogen Emission Spectrum Part III. An Application of AES; Determination of Sodium Part II. Measuring the Hydrogen Emission Spectrum DATA 2 Table 1. Hydrogen Emission Data Color Wavelength, nm violet 430 658.4 2 blue-green 480 487.2 red 660 434.8 411.0 398.4 Spectroscope Data Ocean Optics Spectrometer λ (nm), descending order This template = 60 pts The hydrogen emission file you saved in the lab 7 has a .Master.Absorbance suffix (very much like .doc for word files and .xls for excel files). To import the hydrogen emission spectrum into an excel template, first open a new excel file different from this one. Within this Excel file, File --> Open -->Access your floppy drive (don't just double-click on the file) --> Under "Files of Type" box, select "All Files (*.*)". Click on your desired file. Excel will now recognize the file as text and bring up a Text Import Wizard dialog box. Simply click "Finish" to open the file. 2. You will see a column of wavelengths and a column of absorbances starting on line 15. Select the data (both columns) corresponding to wavelengths between 380 and 700 nm and using chart wizard, plot a graph of Intensity vs. wavelength.Label the axis and provide a title for the graph. [Plotting Graph: Highlight y-axis values (numbers only) -> \Insert -> Chart\ -> XY(scatter)->Sub-chart with no lines-> Next\->Series(top of active windows)->click on X values window-> Go to original data table and highlight all x- axis data ->next\->Complete chart title and label the x and y axis -> Next\ ->Finish 3. By clicking on the λ max points, Excel will tell you the (x,y) coordinate of the point ((x,y)=( λ ,A)). Record the λ max values into Table 1. 4. Paste your graph here. Use these in the data analysis By signing below, you certify that you have not falsified data and that you have not plagiarized any part of this lab report. Failure to sign this declaration will cost you 5 points. Signature: Data here will autofill into the third column of Tables 2- 4 370 420 470 520 570 620 670 500 1000 1500 2000 2500 3000 3500 4000 4500 Intensity vs Wavelength Wavelength (nm) Intensity A: Data Analysis 2 0.250 658.4 1.52E-03 3 0.111 487.2 2.05E-03 4 0.063 434.8 2.30E-03 1 5 0.040 411.0 2.43E-03 6 0.028 398.4 2.51E-03 2 Slope: R from slope: 0.0044000 [R] = 1/nm no y-intercept: R from y-intercept: 0.0026000 [R] = 1/nm 3 3 0.111 658.4 1.52E-03 4 0.063 487.2 2.05E-03 5 0.040 434.8 2.30E-03 1 6 0.028 411.0 2.43E-03 7 0.020 398.4 2.51E-03 2 Slope:-0.01 R from slope: 0.010900 [R] = 1/nm yes y-intercept: R from y-intercept: 0.010800 [R] = 1/nm 3 Table 2. Hypothesis #1; n f = 1; n i = 2, 3, 4, 5, 6 n i values 1/n i 2 λ (nm) 1/ λ nm-1 Is n f =1?...
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This note was uploaded on 04/07/2008 for the course CHEM 152 taught by Professor Chiu during the Winter '08 term at University of Washington.

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152 Exp 6 Report - EXPERIMENT 6: Pts ATOMIC EMISSION...

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