Hydrogen Atom ILA. Use your calibration curve to find the corrected wavelength for the hydrogen atom Corrected wavelength (nm) Observed wavelength (nm)

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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96
EXPERIMENT 0 The Emission Spectra of Aloms and lons
Analysis for Parts I and II:
1. Calibration
The scale on the spectroscope may not reflect the correct wavelength of light. To correct for
this, you will make what is called a calibration curve. For each line in the mercury spectrum that you
observed, write the wavelength at which you observed it in the columh on the left, and the "litera-
ture" value (given in figure 8-2) in the column on the right.
Literature wavelength (nm)
404.7nn
435.8nm
546.1nm
Observed wavelength (nm)
450nm
am s74 onm
Now make a plot of the data above, with the observed wavelength on the x-axis and the lit-
erature wavelength on the y-axis. Draw the best possible straight line through the points. Attach this
plot to your laboratory report.
Now, when you analyze the rest of your data, use this curve to correct it. Find the value on
the x-axis that corresponds to your observed value, and use your curve to find the corresponding
y-value. The y-value is the corrected wavelength and should most accurately reflect your observed
value.
Tip: See Appendix A for instructions on how to make a good plot. You can use Excel or a similar
spreadsheet to make your plot. These programs have options that will allow you to draw a
smooth line through your data.
Hydrogen Atom Emission Spectrum
II.A. Use your calibration curve to find the corrected wavelength for the hydrogen atom.
Corrected
Observed
wavelength (nm)
wavelength (nm)
Transcribed Image Text:96 EXPERIMENT 0 The Emission Spectra of Aloms and lons Analysis for Parts I and II: 1. Calibration The scale on the spectroscope may not reflect the correct wavelength of light. To correct for this, you will make what is called a calibration curve. For each line in the mercury spectrum that you observed, write the wavelength at which you observed it in the columh on the left, and the "litera- ture" value (given in figure 8-2) in the column on the right. Literature wavelength (nm) 404.7nn 435.8nm 546.1nm Observed wavelength (nm) 450nm am s74 onm Now make a plot of the data above, with the observed wavelength on the x-axis and the lit- erature wavelength on the y-axis. Draw the best possible straight line through the points. Attach this plot to your laboratory report. Now, when you analyze the rest of your data, use this curve to correct it. Find the value on the x-axis that corresponds to your observed value, and use your curve to find the corresponding y-value. The y-value is the corrected wavelength and should most accurately reflect your observed value. Tip: See Appendix A for instructions on how to make a good plot. You can use Excel or a similar spreadsheet to make your plot. These programs have options that will allow you to draw a smooth line through your data. Hydrogen Atom Emission Spectrum II.A. Use your calibration curve to find the corrected wavelength for the hydrogen atom. Corrected Observed wavelength (nm) wavelength (nm)
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